Expect problems and setbacks. It's all part of the game. If you're not running into major challenges, you're doing something easy, and probably not that valuable and it's probably not going to make much money for you. A big problem often signals a big opportunity. Be prepared to work long and hard for it.

Don't be afraid to pursue multiple options, or multiple people, at the same time. If one thing doesn't work everything is going to work. In fact, you may have to try a lot of things to get just one thing to work. That's tenacity, and it's critical to success. By: Donald Trump