If you’re not feeling “hell yeah!” then say no
“People think focus means saying yes to the thing you’ve got to focus on. But that’s not what it means at all. It means saying no to the hundred other good ideas that there are. You have to pick carefully. I’m actually as proud of the things we haven’t done as the things I have done. Innovation is saying no to 1,000 things.”
Timothy Ferriss • Tribe of Mentors: Short Life Advice from the Best in the World
Every time you say yes to something you don’t want to do, this will happen: you will resent people, you will do a bad job, you will have less energy for the things you were doing a good job on, you will make less money, and yet another small percentage of your life will be used up, burned up, a smoke signal to the future saying, “I did it again.”
James Altucher • Choose Yourself!
If you're not saying “HELL YEAH!” about something, say “no.”