Use a blind (either homemade or purchased), or use a tree, or draw your bow when the Tom is strutting away from you. Their good eyesight can make it hard to draw your bow.

Practice Practice Practice....their vitals are small.

Turn your draw weight down...you don't necessarly want a pass-through.

Try to use a broadhead that will stick in the bird. (either duller broadheads, grasshoppers, etc)

Set your decoys closer than you normally would with a shotgun.

And scout scout scout