Just do this one thing: promise yourself you'll never deal underhanded to anybody. You'll be honest in all of your business dealings. That is hard. Conquer that one. Demand it of yourself. Demand a higher standard for yourself and your children and do it.
This gets back to the fundamental lesson of political survival that Bill Clinton taught me, which is if you make it about the American people's lives instead of your life, you're going to be okay.