I agree on practicing like you are hunting. I will also add, shoot with the hunting clothes your be wearing. Wearing a t-shirt and jeans in the summer while practicing is a lot different, than wearing a jacket and all your other clothes!!!

It might be hot outside with a jacket on during the summer, but getting used to it will help in the long run!!

shoot your bow like its your job... then it will start to come naturally to you.

All those other things like scent, wind, camo don't mean a thing if you can't properly place the arrow.

Learn to shoot a bow correctly first, proper practice makes perfect.

Like the guys above said, practice - but learning when to take the shot is not as important as learning when NOT to take the shot. Point being, if you're not comfortable with your ability to hit, then pass up on the shot. Set your range from your stand and don't deviate - if you set 20 yards as your max, that means that you have to pass on that 22 yard shot. If you set 30 yards, then you have to pass on that 32 yard shot. You're not less of a bowhunter if you decide to let one walk because your not 99% certain in your shot.

Have fun
play the wind and hunt the food sources