Good post. I worked in a field where it's not customary to tip but received many anyways when I went above and beyond the normal call of duty. I always tip well and pass it forward to those "in the trenches." Another interesting point popped into my head though... I know a field where they can never seem to tell you what it will cost before the service is rendered and they just send you a bill a month or more later. This amount is pretty much what they decide it will be and can ruin your life. Any guesses?