One of the problems of our generation is the lack of concentration and focus.
A lot of people are doing many things at the same time and achieving little or no results. Your results are the product of either your personal focus or personal distraction.
Focus is power. And concentration creates awareness.
When you do one thing at a time and you do it with focus attention, you will create excellent results. But trying to do many things simultaneously limit your power and create a distraction.