If you wait until you feel like doing something, you will likely never accomplish it.
Big-picture thinkers broaden their outlook by striving to learn from every experience. They don't rest on their successes, they learn from them.
You can't be a smart cookie if you have a crummy attitude.
Motivation gets you going, but discipline keeps you growing.
You cannot overestimate the unimportance of practically everything.
Most people who decide to grow personally find their first mentors in the pages of books.