The foundation of confidence in virtually every field is preparation.

One of the most important rules for success is this: Every great success is the result of hundreds and thousands of small efforts and accomplishments that no one sees or appreciates.

Most great fortunes are built slowly. They are based on the principle of compound interest, what Albert Einstein called, "The greatest power in the universe."

All the businesses from the beginning of history have struggled with product development (assuming there is a market, doing the market testing and so on). But now they start with customer development. Get the customer who says, "Yes. I want that. I need it. I wanna use it. I'll pay for it." And then you go back and work with your engineers. It is changing the world!

Only undertake what you can do in an excellent fashion. There are no prizes for average performance.

Luck is predictable; the harder you work, the luckier you get.

If rejection destroys your self-esteem, you're letting others hold you as an emotional hostage.