Boatswainsmate.net has some good study guides for basic CPA and true wind stuff. For avoidance, intercept, and desired wind, look in the piloting & nav. section of the BM2 book. Step by step instructions. Trust me. BM.net is a great place, but nothing beats your book and the pubs it has you reference.
Give me a call on my cell at 303-547-7825and I will be MORE than happy to explain them and walk you step by step through each type or shoot me an email at kenneth.w.thomas@uscg.mil with the types of moboard you would like some help with and I will write out some step by step instructions for you. Will do me some good to shake off the dust since I have been riding a desk for the past two years.