Before determining your calling location, scout the area and identify any obstacles to turkeys, such as a fence, a small creek, a gully, an irrigation ditch or other breaks in the terrain. Situate yourself where incoming birds don't have to make a choice about crossing such an obstacle, because they probably won't. If you're in hilly country, don't set up on a ridge where you'll be skylined. If you expect birds to come from the top, set up about 30 yards downslope, so that when a bird appears it's in range. If there's a big fallen log or blowdown nearby, consider what you'll do if a turkey approaches from behind it, offering too close a shot. It might be best to change your location to avoid that scenario.