After building most of Mint.com's prototype by myself, I talked to anyone and everyone I knew about Mint. It's counter-intuitive, because you might fear someone will steal your idea, but it's the only way to make connections, be sure you're on the right track, and provide a solution for an audience broader than yourself.
Authenticity is everything! You have to wake up every day and look in the mirror, and you want to be proud of the person who's looking back at you. And you can only do that if you're being honest with yourself and being a person of high character. You have an opportunity every single day to write that story of your life.