Happiness can be bought with a bottle of wine and has become ambiguous through overuse.

Do not expect work to fill a void that non-work relationships and activities should Work is not all of life. Your co-workers shouldn't be your only friends. Schedule life and defend it just as you would an important business meeting. Never tell yourself "I'll just get it done this weekend."

Changing the world doesn't require much money. Again, think in terms of empowerment and not charity. How much were Gandhi's teachers paid? How much did it cost to give Dr. Martin Luther King the books that catalyzed his mind and actions?

I think about willpower almost never. I realize for myself, trying to be more disciplined is pretty nebulous and it's often a slippery target. For me, I've just thought about incentives.

What's the worst that could happen?

Everyone is going to binge on a diet, for instance, so plan for it, schedule it, and contain the damage.

I always point people to the article '1,000 True Fans' by Kevin Kelly. If you choose your thousand ideal customers or readers properly and find the single author blog that targets that audience, you never have to do any more marketing. You're done. That is a lesson that very few product developers and marketers have learned, and it's unfortunate.