If you want to get rich, start by studying the people who have already done so.

“The only person who can teach you how to think like a millionaire is a millionaire,” writes Steve Siebold in his book, “How Rich People Think.”

The same could be said about billionaires.

Below, we’ve rounded up 11 habits of self-made billionaires. You may notice that none of them require dramatic life changes — a few tweaks here and there to your daily routine could result in huge gains.

They meditate