If you know where there is a flock of birds, the odds go up dramatically. Find where they roost and get in there before light and set back and enjoy, you should hear lots of calling by the birds. I've had good luck calling back to them, pulling some or the whole flock to investigate. If they're not close enough to cleanly kill one, charge them and split them up, if you can get them to go in all directions, you've got a good bust. Within minutes they will start calling to re-assemble. Imitate their calling and one or more may come in. Good luck and enjoy the fall woods!
Here's a clip of some basic calls on one of my long boxes, fly down, cluck, yelp and kee kee.http://www.youtube.com/watch?v=Ctzz0agkD-g