YOU MUST Wrap your hands not even just sometimes!!! And kick with your shins as if you are srtiking some one with a bat I have mentioned some techniques in earlier posts in this place just do a search or go through some past threads. Technique as Ramma said the MOST important thing go slow and do it right but always hit it hard so you get use to it. And yes warm up your engine first but that is a must in any athletics that you do. Injuries happe if you don't.