The Power of Countdown Timers
To learn and perform well you need to be able to focus well on what you are doing. In this article I explained what the benefits are of deep concentration and what disadvantages are of being interrupted and distracted during work. Focus is important. It is also important to realize that it is impossible to focus all day long. It is probably not wise or even possible to focus deeply for more than 4 or 5 hours a day. Focusing longer does not only fail to lead to extra gains, it also can be harmful. It may lead to mental exhaustion.