When valuing a startup, add $500k for every engineer, and subtract $250k for every MBA.
It's okay to doubt yourself, it's okay to feel down; just never give up.
Solve a real problem and the world is yours.
Observe the world around you everything you do, and especially everything you hate to do.
Recessions are great because they unlock the best people.
Solve a real problem. You don't start a company because you want to be an entrepreneur or the fame and glory that comes along with it. You become an entrepreneur to solve a real problem.