Vince,
Your "charm" school question is a good one. I would encourage you to check out Charlie Greer aka TechDaddy. His training is unbelievable. He covers everything from preparing yourself professionally to handeling anything that comes up with a customer. You will be amazed at how much he teaches you. How to use a flat rate book, how to sell service agreements on every call, and overcoming price objections are just a few of the topics covered.
www.charliegreer.com. If you need other testimonials, I know a lot of other contractors who use his dvds for training. It is truly unbelievable how awesome the set is.