You're always going to be your own enemy. You're going to feel bad about things that you do that aren't right. Developing discipline, developing integrity and belief in your own integrity is extremely important because of what you just said. It takes a tremendous burden off of what you would normally feel guilty about.
How do you beat burnout? Here's the reality: It's something that has happened (or will happen) to anybody who is trying to build/run a business and/or do something great and sustain it over the long haul. Have you lost hope in the process? Have you lost your vision for what you're trying to accomplish? There are a number of reasons why people burn out. I talk about these and other main causes for burnout and share what my experience has taught me about overcoming it and pressing on.