If it is a new woods or a woods I really don't know very well I like to slip in right before daylight and just sit down and listen for gobbling or fly down noises, that will get you started on finding roost areas, strut areas, dusting areas, feeding areas, etc. If possible I like to get somewhere that is above the area I am trying to listen to, like the tops of ridges over looking bottoms and long tapering ridges. Once I hear some birds I try to stay in contact with them as long as I can after they fly down but not spooking them so I can figure out where they like to go after they fly down. Leave all your calls at home so you won't be tempted to call to them before the season opens.