There are a few things that I found to be keys to success with decoys. The first is to be sure that the decoy is facing away from you. Buck will aproach a doe from the rear during the rut. If the decoy if facing towards you this means he will be walking right at you and not present a shot also reducing your ability to draw without being seen. On the other hand if he's walking away from you towards the decoy you will have a quartering away shot and be able to draw. Another tip is to take small strips of white fabric and pin them to the tail and ears. This will add a little movement to the decoy and increase the odds of a buck coming in. I always combine the use of a decoy with scents and calling as well. I think when used together they can be very effective. Of course having a good buck to doe ratio is always the key. If there are far more does than bucks it's always tough pulling a nice buck off his does. However, if the bucks are very competetive fighting over the does they will be more succeptable to coming in. Good luck.