Avoid debt
Millionaire Derek Sivers sold his company, CD Baby for $22 million in 2008. But even when he paid the bills as a professional musician and circus clown, he avoided debt. He says:

“I’ve always been very debt-averse. I don’t like being in debt at all, even on the small level. I never bought anything with a credit card unless I had that much money in the bank. The credit card was just a convenience. I never went into negative debt on a credit card, even as a teenager because I just hated that feeling. They say that there are two ways to be rich: one is getting more money, and the other one is lowering your expectations, lowering your needs.”

Derek says that when he was in his 20s he lived off of $12,000 in savings for a few years. Then he got a job with the circus making about $12,000 a year, and he felt rich.

Derek also gave the proceeds from selling CD Baby to a charitable trust for music education, and he continues to live a frugal lifestyle.