The best advice I ever came across on the subject of concentration is: Wherever you are, be there.

There are only 3 colors, 10 digits, and 7 notes; its what we do with them that's important.

The difference between where you are today and where you'll be five years from now will be found in the quality of books you've read.

The best time to set up a new discipline is when the idea is strong.

Discipline is the foundation upon which all success is built. Lack of discipline inevitably leads to failure.

Goals. There's not telling what you can do when you get inspired by them.

Be fascinated instead of frustrated.