If you are allowed to use the spike traps where you live, they are very effective. I'm not allowed to use them here but I've had good luck with a smoke-bomb product the sell at my local hardware store. I have had no luck at all with the more "humane" and natural options like plants, noise, and windmills.
Your local hardware or garden store will have lots of choices.
The most effective solution was my neighbor's new outdoor cat. Haven't seen a mole hill since he started prowling the neighborhood at night a couple years ago.
Last edited by dftc; 03-10-2013 at 06:36 PM.