The 3 biggest things i've learned over the years are:
1. Scout. Hunt where the birds are.
2. Soft calling.
3. Patience. Turkeys don't get in a hurry and              neither should you!

In Pa we have lots of pressure,locate birds before season,try to figure out their travel patterns,patience when set up,I've had better success later in the morning when alot of guys have given up,soft calls spaced out longer then most can wait most people call too much.

12 gauge......

place your decoys close and use a bullhead broadhead, aim for the largest vital area on a turkey, the head and neck!!