15 Secrets Successful People Know About Time Management: The Productivity Habits of 7 Billionaires, 13 Olympic Athletes, 29 Straight-A Students, and 239 Entrepreneurs

by Kevin E. Kruse

“The difference between successful people and very successful people is that very successful people say 'no' to almost everything.”—Warren Buffett

You have to be more selective about the things you say YES to.