And if you can't find a mentor, this book is a good place to start:
http://www.amazon.com/Turkey-Hunting...rkey+hunting#_
It's an easy read, informative, and interesting
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You asked about decoys. There's a lot of thoughts out there about them and no one right answer. I either use one hen, or a hen and jake. Or nothing. I think they can spook turkeys that have seen them before, something to consider if you are hunting heavily pressured public ground, especially later in the season. I guess the answer is, it depends.