1. Know whats beyond that turkey. For the other turkeys sake and ESPECIALLY for other hunters sake.
2. If hunting on the ground sit by a tree wider than you are. It saved me from a few pellets before, plus they are generally more comfortable.
3. Try not to use jake decoys on public ground.
4. Load your gun after you get set up (rarely will you be able to get any shot at a running/flying turkey) so it's not worth the risk.
5. Might sound basic and simple but bring water if its hot. I went through a liter in one afternoon when it was hot.
6. I always have a cell phone for emergencies, but you might want to make sure it's off or silent.