I can’t say enough about bootstrapping. Whether you’re starting your first business or your next one, my advice is to bootstrap it. Bootstrapping forces you to think about making money on Day One. There’s a fundamental difference between a bootstrapped business and a funded business. It’s all about which side of the money you’re on. From Day One, a bootstrapped business has no choice but to make money. There’s no cushion in the bank and not much in the pockets. It’s make money or go home. To a bootstrapped business, money is air.
http://www.inc.com/magazine/20110301/making-money-small-business-advice-from-jason-fried.html