“Self-made millionaires do not rely on one singular source of income,” Thomas C. Corley, who spent five years studying rich people, writes in “Change Your Habits, Change Your Life.”

“They develop multiple streams. Three seemed to be the magic number in my study … Sixty-five percent had at least three streams of income that they created prior to making their first million dollars.”

Examples of these additional streams are real-estate rentals, stock market investments, and part-ownership in a side business.

4) Being content with what you already know.

The wealthiest, most successful people are constantly exercising their brains and looking for ways to continue learning long after college or their formal education is over.

This choice is entirely up to you, emphasizes self-made millionaire Daniel Ally at Entrepreneur: “Often, people depend on their employers to buy them books, send them to seminars, or provide them with coaching. However, you must take your education into your own hands if you want to prosper. Invest in yourself.”

5) Hanging out with the wrong crowd.

“Einstein said that consciousness is contagious,” Siebold writes. “That doesn’t mean dump your friends because of their low net worth. But if you want to become rich,you need to start associating with other rich people.”

Think of it this way: “If you wanted to become fit, you would hang around fit people at the gym. If you were interested in religion, you would associate more with people at church,” he explains. “So if you want to become wealthy, get around other wealthy people and learn from them.”

6) Spending your free time having fun, and fun only.

Rich people would rather be educated than entertained. Take Warren Buffett, for example, who estimates that 80% of his working day is dedicated to reading.

According to Corley, 67% of rich people watch TV for one hour or less per day, while just 23% of poor people keep their TV time under 60 minutes.

The rich spend that TV time reading — and they particularly like self-improvement books. “The rich are voracious readers on how to improve themselves,” Corley writes. In fact, nearly 90% of them read for self-improvement for 30 minutes each day.