I suggested to Magic's owners that they try to find a copy of Clinton Anderson's Horsemanship 101 DVD. While I don't fully agree with all of Clinton's teachings, I have yet to find any other trainer that does as good a job of explaining as clearly and concisely how to gain respect and control from your horse. The 101 video is a great summary of all of the basic maneuvers that Clinton teaches.
If you have the money to buy and time to watch a lot of training footage, I also recommend Clinton's Gaining Respect and Control on the Ground series as well as his Riding with Confidence series. These series include more exercises and go into more depth on each one than the 101 DVD. Over the last year or two, Clinton has been putting out new DVD kits to replace the ones I've listed above. I'm sure the new DVDs are excellent (haven't seen them yet--they're pretty expensive), but what I'm really hoping is that they will help bring the price down on his older ones. Check out Ebay for deals on used copies.