I agree with the above and will add a couple of things...
1. Try to "roost" birds the night before. Watch them in the evening roost in the tree. The next morning SNEEK in there before first light and set up in the most logical spot for them to fly down.
2. Like posted above, place the decoy 5-8 yards from the blind.
3. Position the decoy facing the blind. The thinking here is that the Tom will be trying to get the hens attention and will walk right in front of it so "she" can see him.
4. If you are going to hunt out of a blind, make sure you practice shooting out of it and then practice some more. Practice shooting sitting down too.
5. Don't call too much. A few now and then to let the birds know you are in the area is all it takes.
6. Be patient and have fun. Turkey hunting is my favorite way to welcome spring. You get to sit and watch the sun come up. The weather is usually starting to get nice, the grass is greening up, the birds are singing.
Ahhhh heaven...
Good luck and let us know how it went.