Reuse pet fur
If you own a cat or dog, the odds are good that your clothes, floors and furniture are covered in fur. But instead of seeing that fur as a nuisance, why not see it as a soft blanket, a warm sweater or even a business opportunity? It may seem odd, but there are plenty of people out there knitting dog-hair afghans and making cat-fur handbags. If you're an experienced knitter, there are books like "Knitting With Dog Hair," or you could always collect your pet's hair and mail it to a company like VIP Fibers that will spin the yarn and knit the garment for you.
Curious as to what a cat-hair handbag looks like? See how Danielle German of Catty Shack Creations goes from Persian to purse.