Knowledge provides the edge in specialisation to the extent that if you are not continually learning in your specific subject, then whenever you meet another person who is, they will win, and you wont.
When our life is supremely concentrated in the present, there is no need to worry about what has been, or be fearful for what may be. For the right response will come to us for every situation as it occurs.
Whenever a person resolutely determines something and is truly willing to do what is necessary, regardless of obstacles, the indomitable-will becomes active. Whatever is asked in such a way is received, for absolutely nothing can resist such a will.
The best way to simplify your life is to invest your valuable time in what is important to do and that must be to focus your attention on those tasks that in turn maximize the returning value of the time and energy you have invested.