Even when you're extremely busy, you aren't using your time with 100% efficiency. There are gaps in everyone's schedule where they aren't doing anything important. Even if your schedule hasno gaps, there is probably lots of time where you aren't working as fast or as effectively as you possibly could.

    Why aren't you completely efficient? It's because time isn't thelimiting factor. If it were the limiting factor, people could work non-stop without breaks or any unproductive distractions. Instead, people, even those who are highly productive, need to take breaks, occasionally procrastinate(拖延) and slow downon tasks throughout the day.

    The real and most important limiting factor for productivity is your energy levels to pay attention. Energy levels limit your productivity because when you're tired, you can have ample time and still not get everything done. Your attention ability is also limited, because even if there are amillion things that need to be done, you can only focus on one or two at a time.

    You might not be able to insert another 4-5 hours into your schedule without making some sacrifices. But even extremely busy people can addan hour or two into their schedule without can celling anything. The reason it's hard to “find time” isn't a lack of time. It's because you don't have enough energy left to focus on something else that needs to fit into your day.

    I first suspected time wasn't the real problem during an extremely busy period in my life over a year ago. I was insanely busy, but at that time I still exercised regularly. I had daily-to-do lists with over twenty items, and I still found time to exercise. However, after a few weeks off, due to illness, stopped exercising. I was not busy by any standards, in fact, my schedule was incredibly light. Despite this free time, I found it hard to find time to exercise. It seemed to get pushed later and later into my schedule until it was gone. How can I explain this odd experience? I believe you haveknown it.

    How fit are your teeth? Are you lazy about brushing them? Never fear: An inventor is on the case. An electric toothbrush senses how long and how well you brush, and it lets you track your performance on your phone.

    The Kolibree toothbrush was exhibited at the International Consumer Electronics Show in Las Vegas this week. It senses how it is moved and can send the information to an Android phone or iPhone via a Bluetooth wireless connection.

    The toothbrush will be able to teach you to brush right (don't forget the insides of the teeth!) and make sure you're brushing long enough. “It's kind of like having a doctor actually watch your brushing on a day-to-day basis,” says Thomas Serval, the French inventor.

    The toothbrush will also be able to talk to other applications(应用) on your phone, so developers could, for example, create a game controlled by your toothbrush. You could score points for beating monsters(怪物) among your teeth. “We try to make it smart but also fun,” Serval says.

    Serval says he was inspired by his experience as a father. He would come home from work and ask his kids if they had brushed their teeth. They said “yes,” but Serval would find their toothbrush heads dry. He decided he needed a brush that really told him how well his children brushed.

    The company says the Kolibree will go on sale this summer, for $99 to $199, depending on features. The U.S. is the first target market.

    Serval says that one day, it'll be possible to replace the brush on the handle with a brushing unit that also has a camera. The camera can even examine holes in your teeth while you brush.

    In Western society, especially in the English-speaking world, the chance for young people to see the other countries and experience life is considered important. Many young people, when they finish school at the age of 18, take a gap year before they go to university.

    Parents often want their children to grow up a little and see what the real world is like when they finish school. Although they are worried about their safety, many think that the advantages of independence and experience are worth the worries. Children are encouraged to be brave, independent and to explore the world on their own or with friends.

    Young people also want to experience freedom and see what life is like on the other side. This other side could be the other side of the world or just the other side of life. For example, if they have a rich life, they may want to see how people in poor areas live.

    A gap year after school is also an important chance for young people to spend time thinking about what they want to do with their lives. A little bit of growing up and experience will help them make their important career decisions, especially when they are unsure about what they want to study.

    Another reason for going straight after school is to get a break from studying before they start the next few years of university. So anywhere you travel in the world, you will meet young European people exploring the world.

    So much of the world has been travelled and explored. The young people are now looking for more worthy experiences. Some of them work as volunteers to do something for the country they are visiting. Many gap year volunteers are now spending a few months teaching English in Thailand, helping feed giant pandas in China or building a well(井) in a village in Africa.

    These young people's wish to explore the world is an expression of the values of the societies that they are part of. Both discovering the world and making a positive difference in it are important parts of the Western mind.

    Telling fewer lies benefits people physically and mentally. Anita E. Kelly, study author and professor of psychology at the University of Notre Dame, employed 110 adults for her study. She divided them into two groups and asked one group to stop lying for 10 weeks. Lies included big ones and tiny ones—any false statements—but participants were still allowed to leave out the truth, keep secrets and avoid questions they didn't want to answer, etc. The other group wasn't given any special instructions about lying.

    It turned out that both groups reduced their lying, but those who were specifically told to tell the truth improved their health more. "We found that the participants could purposefully and dramatically reduce their everyday lies. That in turn was associated with significantly improved health," said Kelly.

    When participants in the no-lie group told three fewer white lies than they did in other weeks, they experienced, on average, fewer mental-health complaints and physical complaints. They were less likely to feel tense or sad and also experienced fewer sore throats and headaches. They also reported that personal relationships improved. Additionally, participants found themselves honest about their daily accomplishments, and they stopped making up excuses for being late or failing to complete a task, for example.

    "It's certainly a worthy goal to have people be more honest and interact with others in a more honest way,” says University of Massachusetts psychologist Robert Feldman. “That would be beneficial. I'm a little doubtful whether it makes us all healthier, but it may make us healthier in a psychological way."

    For some people, music is no fun at all. About four percent of the population is what scientists call "amusic." People who are amusic are born without the ability to appreciate music or recognize musical notes (音调). Amusic people often cannot tell the difference between two-songs. Amusics can only hear the difference between two notes if they are far apart on the musical scale.

    As a result, songs sound like noise to an amusic. Many amusics compare the sound of music to pieces of metal hitting each other. Life can be hard for amusics. Their ability to enjoy music sets them apart from others. It can be difficult for other people to identify with their condition. In fact, most people cannot begin to understand what it feels like to be amusic. Just going to a restaurant or a shopping mall can be uncomfortable or even painful. That is why many amusics intentionally stay away from places where there is music. However, this can result in withdrawal and social isolation. "I used to hate parties," says Margaret, a seventy-year-old woman who only recently discovered that she was amusic. By studying people like Margaret, scientists are finally learning how to identify this unusual condition.

    Scientists say that the brains of amusics are different from the brains of people who can appreciate music. The difference is complicated, and it doesn't involve defective hearing. Amusics can understand other nonmusical sounds well. They also have no problems understanding ordinary speech. Scientists compare amusics to people who just can't sec certain colors.

    Many amusics are happy when their condition is finally diagnosed (诊断). For years, Margaret felt embarrassed about her problem with music. Now she knows that she is not alone. There is a name for her condition. That makes it easier for her to explain. "When people invite me to a concert, I just say, 'No thanks. I'm amusic,'" says Margaret. "I just wish I had learned to say that when I was seventeen and not seventy."

Where am I? What am I doing? If you're one of my 500 friends online, you'll always be the first to know. My phone and laptop are never out of touching distance, so I'm endlessly checking through all my social networking apps - whether I'm having a coffee, on my way to school, watching TV. . even when I'm in the shower. I have a never - ending flow of messages and updates from all the people I associate with online. Yet the truth of the matter is: I feel lonely

I'm not the only person who feels this way. According to research, over two-thirds of young people find it easier to make friends online than it is "in real life". I'm a shy person, but I'm wired up (上线) every day, like most of my friends. On the surface, phones bring us closer together. But in reality, my mind is always a million miles away.

I often feel depressed, dissatisfied and alone. Since I spend so much time socializing online, I even become a procrastinator (拖延者). I keep postponing things that are important in my real life: homework, tasks, connecting with my friends and family members in a meaningful way. It's funny that my friends and I chatter away online so much, but we end up having nothing to say when we meet.

What is rally worrying is that no one I know, including myself. could go cold turkey. I can't even imagine going without social networking for a week - think of all the important appointments, invitations and news updates you would miss! Alcoholics (酗酒者) who want to quit drinking can avoid drinks, but how do we give up our phones? After all, I need it for my studies because my teachers and classmates need to contact me at any time. So, that's the problem with social networking. We're hard-wired in, but we're more disconnected than ever.