Opinions expressed by Entrepreneur contributors are their own. Imagine you are thriving, convinced you’re on the road to success. Then, all of a sudden, you hit a wall. You don’t even want to get out ...

Imagine you are thriving, convinced you're on the road to success. Then, all of a sudden, you hit a wall. You don’t even want to get out of the bed, let alone make the bed. You don’t feel like eating, ...