I do not equate productivity to happiness. For most people, happiness in life is a massive amount of achievement plus a massive amount of appreciation. And you need both of those things.

Perfection is an impossible destination

Never check email first thing in the morning. Instead, complete your most important task before 11:00 A.M. to avoid using lunch or reading email as a postponement excuse.

People frequently fail when they try to do everything at once. They approach a massive project and quickly get discouraged. Taking small, but high-value steps takes less time, and you learn more in the long run.

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

For most people, life would be boring without meaningful work.

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?