Personally, I believe the most effective method for finding gobblers to hunt is by being on your land at the first hint of daylight in the morning,...not sunrise, not fifteen minutes before sunrise,...but at the time when you first start seeing the eastern horizon starting to glow. Pick the spot on your land that you think you would be able to hear the greatest distance in any direction,...and sit there and wait until sunrise.
If you have gobblers roosting on the property,...or even nearby,...you will hear them gobble at some point. If you hear gobbles, mark the location you heard them. If they are quite distant, move towards them until you have a good idea of where the birds are roosted. Try not to disturb them, and as has been stated, do not call to them. If you do, you are only hurting your chances of calling those birds in when the season starts.
Undisturbed turkeys will often roost in the same general location,...and often in the same trees night after night. Unless you will not be the only one hunting any birds you hear, it is likely that any gobblers you hear a week or two before the season starts will be roosting close to where you hear them while scouting.
If you hear gobblers, stay as inconspicuous as you can,...and try to observe what they do when they come off the roost. Turkeys are creatures of habit, and they will often follow the same routine day after day,...once again, assuming that they are not being disturbed too much. A few mornings of being in the woods at first light will provide you with all the information you need to have to kill a gobbler,...assuming they are roosting on your property or nearby. Knowing what your turkeys are going to do when they come off the roost,...and then setting up close to the spot where turkeys fly down to start their day,...is probably one of the surest ways to kill a gobbler. If you find a roost site, observe where the turkeys fly down, and after they have left to wander off for the day, you can find a good location for a blind, or build you one, as close as you can to the flydown location. On opening morning, you will have a great opportunity to get a bird first thing,..even if you do not know much about turkey calling (which I'm sure we will discuss more about as the season draws closer).
In the unfortunate circumstance that you do not hear any gobbling while listening for a morning or two, then your next step is to verify that you have turkeys using the property at all. During the day, you can ease around the property looking for tracks and droppings and using binoculars diligently to look for birds in fields and woods openings. We talk about "locator calls" a lot, and using locator calls to find gobblers is an art in itself. If you are unclear about locators, and their proper uses, let us know and we can get you situated with that, as well.
If you were to be unlucky enough not to have some evidence of birds working your land, then the next step is to talk to your neighbors and friends about places where you might hunt where there are birds. Do not discount public lands in your area if you cannot find a good place to hunt on private land. In areas where there are lots of private lands, hunters will often ignore public lands because a) they think those public places will get hammered by hunters, and b) because they often have really good private lands to hunt on,...and do not need to go to a public hunt area.