Your most important tool to be successful is your brain. What do you know about your brain that is of practical help every day to get the best out of it? Most people, even highly educated professionals, do not know anything about their brain and what they know is often not correct and not useful. Even without this knowledge about their brain, more and more people discover that the way they use their computers and especially their smartphones does not improve, but undermines their intellectual productivity and even their health. Quite a few then worry that there is something wrong with...