It's okay to doubt yourself, it's okay to feel down just never give up.

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.

When valuing a startup, add $500k for every engineer, and subtract $250k for every MBA.

Recessions are great because they unlock the best people.

Observe the world around you everything you do, and especially everything you hate to do.

Tell anyone and everyone your idea without fear they're going to steal it.

Solve a real problem and the world is yours.

People do make judgments of trust on appearance - in the real world and online.

The other big factor in building trust quickly is site design quality. Mint.com has one of the best graphic designers ever (Jason Putorti) - he cares about every pixel, all the fonts, all the transparencies and effects. And that shows instantly. People do make judgments of trust on appearance - in the real world and online.