Perfection comes from being aware of your flaws.
Next week I have to write a presentation on ethics. Heres the tack I'm taking:
Know your price. If it is too low, set it high.
Know what it is that would cause you to violate laws, oaths, marriage covenants etc. Then set your self up some good let and right limits in order to avoid them.
Look, if Angelina Jolie drove up in a Porsche with a suitcase full of one million dollar bills, well, then my immediate reaction drill is to call a cab or walk away.
If you identify your price from the outset, you'll save yourself (and career) alot of heartache down the road.