I second Mike Holts book. I got the book and library and I learned lots. I don't have a business so don't listen to me to much
I would get a good labor unit book, or estimating software. From past experience the supply house will honor a quote up to 30 days, have your Contractor quotes to expire in 30 days (I am assuming you are doing small projects).
write a business plan. You don't don't go on vacation with out a plan so why would you invest thousands of dollars and hours and not have a plan.
Negotiating/sales is the trickiest part.
AWL send me an email I might be able to help you out, or make things worse
