I agree with "six"!
before you go out with your boss, get on your computer and whip up an excel spread sheet checklist of a typical residentail service call.
start with the customer's name and end with final measured pressures, temperatures and superheats or subcool, and everything in between. not only will it impress him, but it will make you a more thorough service tech.
also don't be afraid to keep a notebook of things you have learned along the way...we can't remember everything all the time!
a good service tech doesn't only fix problems, he prevents problems!