Best practice is to shoot live animals with it, pigs or some sort of cull. Difficult if you don't have access to that sort of thing. Even using it for some deer hunts. It might mess up some meat but if you can get shots at say 50 metres or less on deer it will be good practice.

I think a mixture of learning to snap shoot, ie shoot very soon after the butt hits your shoulder and shooting running game targets is also worthwhile. Shooting just static targets doesn't help train anyone for running targets. I am not a great running shot myself so this is an area I need to improve on. However I will be looking for a great opportunity for practicing on hopping 'running' targets as well as paper.