Go to espn.com and link to the outdoors section. There, they have a pretty neat link to the current month's solunar charts. They tell you when the moon is overhead and underfoot. If you read about animal activity levels during these times, you'll learn that there is a correlation.

I use it, but I'd be out there anyway. It just gives me some ray of hope to stay in the stand for the next few hours, a reason to not give up. I carry one in my pack and look it over each day.

Every once in a while, you actually see an animal during the times recommended, and that makes you feel pretty smart.