Michael Uslan

You must knock on doors until your knuckles bleed. Doors will slam in your face, I guarantee it. You must pick yourself up, dust yourself off, and go back and knock again. It's the only way to achieve your goals in life.

Sometimes you have to take calculated risks and roll the dice, or risk growing old and having to say, 'I could have been....'

Don't believe them when they tell you how bad you are and how terrible your ideas are, but also, don't believe them when they start telling you how wonderful you are and how great your ideas are. Just believe in yourself and believe in your work and you'll do just fine.