Camo up all the way and hit the woods. A turkey's not a real smart bird but they're very observant. You may get away with sounds but not movement. In fact I usually intentionally make noise like those of a bird flying off the roost or feeding birds scratching through the leaves. Make an unwarranted movement with a bird coming in though and it's likely the game is over. Also remember they can see that movement something like 270 degrees around them without ever moving their head.
Learn to call. A box or slate call will make almost any call you want and they're easy to operate. A mouth call(diaphram) is a little harder to master but sometimes essential to your success simply because you can operate it hands free involving no movement. Some of the worst sounding calling I've ever heard came from live birds.
Basically you want to be in the area of a roosting bird to hear him gobbling off the roost. Sometimes they'll repeat their movements and calling 2 or 3 days in a row but just as likely not to. The object is to:
1) Get him to fly down to you while you sound like a hot little hen
2) Get between him and where he's headed if he doesn't fly down to you
3) Get to where he's headed before he does, or
4) Catch him where he wants to be and work him into the gun
Sometimes you can anticipate where the birds are headed. For instance, typically after an early morning rain they like to head to open fields or pastures to dry out while hunting for food.
Decoys aren't necessary and a hassle to run and gun with but they can be fun to use...and beneficial
All in all it's sort of like a cross between playing chess and poker. Move and counter move, think several moves ahead, and know when to hold them or fold them (call or don't call). It's a ball when the birds are talking and cooperating. It's a test when they aren't.