Josh,

Do a search in myspace or youtube for trainign vids of pro fighters. Then just emulate them on the speed bag. Having said that, don't worry about the speed bag too much. Quite honestly, they don't do much for you, IMO. You get a shoulder workout but not much more.

and don't let anything anyone tells you bring you down. Just keep emulating the pros. Watch them carefully and do it like they do it.