Don’t Get in Over Your Head
"How much money can you stand to lose? That's how much risk you should assume," Trump wrote in his book, "Trump: Think Like a Billionaire: Everything You Need to Know About Success, Real Estate and Life." "If you can't afford to lose it, play it safe."
When you're investing in a venture you're excited about, it's easy to get caught up in the moment and decide to go big or go home. However, Trump recommends keeping a cool head when it comes to business.
"You should never fall in love with your investments," he wrote. "If you do, you're in big trouble."