Another way to practice during the season and this is better if you're a morning hunter. Take with you one or two arrows that have Judo tips on them. Guesstimate a leaf or other object and try to shoot it just before leaving your stand. Make the object a challenge and you'll both challenge and test your real skills. It's quite a confidence builder when you're successful.
That's pretty much what I alway have done for years, both morningand evening hunts, except I have a few arrows marked as practice arrows and I use broadheads. Once in a while I may bury one in a root or such, but not too often.Oh, and I don't necessarily shoot them just before leaving my stand. Just whenever I feel like it.