Scout, scout , and scout some more . You need to find their roosting areas . If your hunting Easterns they may not roost in the same tree , but many times they will be in the general area . I've pegged a small flock this fall that has been roosting in the same holler since August .
Another trick is when your moving through the woods , espescially in dry leaves , is to be careful not to allow brush and bushes to rake your clothing making any noise foreign to the woods . Your footsteps in the dry fodder will get the attention of any nearby and unseen turkeys . Move a few yards and stop and listen . Like Eggshell said , listen carefully , they will call even though you didn't make a call . When you move and stop and hear nothing in a couple minutes then try your calls to strike up some turkey talk. Do lots of leaf scratching too. After each series of cold calling or leaf scratching , or just moving from one place to another in the woods ,,,focus quietly and listen intently . PATIENCE