Self-made millionaire: Why you should work on holidays

Self-made millionaire Grant Cardone believes in logging a lot of hours, even on weekends and holidays. "There are 168 hours in a week. You should be working most of them," says the entrepreneur, who himself puts in about 95 hours a week.

If you want massive success, you have to grind, he tell CNBC Make It. And you have to be prepared to do it when no one else is: Instead of doing what the crowds do, "work when others aren't."

That means using Memorial Day and other conventional days off to focus on earning and getting ahead, he says: "Spend your time working holidays when no one else is." Ultimately, "if you want to change your condition, you have to work. If you can outwork the rest of the population, you're going to get lucky." Read More