Happiness is merely a byproduct of usefulness. You don’t have to change the world or anything. Just make it a little bit better than you were born. When you do little useful things every day, it adds up to a life that is well lived. A life that mattered.

Focus on no more than three core things every day. 

Wake up every morning and figure out what the most important two or three things are for the day, and cut out the rest. Give each some allotted time instead of switching tasks.

1. Wake up early.

2. Ask: Am I using this technology, or is it using me?

3. Forget about outcomes—focus on making a...