For complete list: http://www.life.gaiam.com/gaiam/p/50WaystoReuseYourYogaFitnessMatBestidea.html
Use cookie cutters to cut the mat into holiday ornaments
Cut down for placemats for pet dishes. Keeps the area neat while also prevents the dishes from sliding around
Clean the mat well and use it to line kitchen shelves
Use the mat to smother weeds in your garden.
Instead of buying a rug pad, use an old yoga mat (or two) to keep your rug in place. Rug pads also make vacuuming your rug easier.
Instead of packing peanuts, wrap pieces of a yoga mat around your valuables.
Strips of old yoga mat make colourful stair treads.
Use a piece as a welcome mat outside a kitty litter box. The mat’s stickiness grabs the litter off paws preventing it from spreading throughout the rest of the house and protects kitty’s paws as well
Cut into rounds and use as coasters
Cut a piece to use as a sunshade in your parked car when it gets really hot