1. Roost your birds the night before if possible, but dont scare them. You have a much better chance of killing the bird if you know exactly where he is so you can move and get on him before he flys down.
2. Call as little as possible. Just try and get him to come in to you and do not call when you see him comming, unless you use soft purrs and clucks.
3. If he hangs up out of view, back up and call again.
4. Decoys can hurt and help... it depends on gthe bird.
5. It sometimes helps to have 2 people when calling turkeys. a shooter and a caller, that way the shooter can focus on the bird and not so much on calling him in.