Oh yes, I know of one sure way, works 100% of the time:

A man buys an apple, walks around, and sells it. Then, he buys two apples, walks around again, and sells them. Next, he doubles his effort by buying four apples, walking around, and selling them as well. Suddenly, he receives a phone call informing him that his wealthy cousin has passed away, leaving him a substantial inheritance. Now, the man is wealthy.