I agree with Pat on what can help. I've seen many hens/discovered turkey nests on spots such as under partly fallen logs, in brush edges, etc., so I'd think making a brush pile would be a good idea, if you keep it loose so the hens can find a spot on the ground where they could make a nest. I think that cutting and leaving smaller timber would be good, too, maybe like the clear cut suggestion. And getting to the field edges is especially good. I've seen/discovered more nests/nesting hens on the outside edges of heavy woods than elsewhere.