I shoot hill style. One of the best resources you can get is the DVD Hitting em like Howard Hill. Watch videos on this site of Ron Laclair and of course Hill. Really critique the method they use. Every aspect of the shot sequence can be viewed and stopped. I was taught to shoot Hill style as a teen, and deviated in many directions on my form over the years. Today, I believe this style is just effective in shooting game, and only use this method in hunting with a longbow.
When shooting at animals, things can get a bit tricky with all of the adrenaline. The thicker limbed longbow, heavy arrow, and adaptable style just works well. If you can stick to one methos of shooting, you will be far better off.
I review the John Schulz DVD many times if I am having issues with my form. When learning form get about 5-8 yrds and just work on the shot sequence. Each aspect of a perfect shot.
When in the field roving only think about the tiny spot you wish to hit and let the muscle memory take over on the shooting form. Always point your bow shoulder at the target no matter what position you are in. Your consious mind can only focus on one thing at a time. There is a time to do bale work and a time to nail things.
Have fun, never dull with a longbow in hand!
Jeff