Practice!
When Archery Deer and Turkey season opens, all my spare time is consumed by hunting. Spend 30 minutes in the back yard touching up your skills every so often to keep sharp!
The reason I posted this, was that I did just that today (for the first time in quite a while). Even a dear friend like my Schafer recurve can get cantankerous if you neglect him. Shooting a blunt on the way to your stand helps too, but I need some repitition to make sure everything is still grooving.
I have to remind myself every year to shoot a few rounds on days I can't hunt. Don't head out to the woods with dull broadheads -OR- dull skills.