Jeans are great, but lets face it, you probably have at least one pair that has a hole or rip in them. If you ignore it, it will just get worse, but it is easy to fix!
Scrap of jean material (cut from an old pair of jeans)
Jean colored thread
Basic sewing machine (available at TechShop)
Step 1: Cut a patch/backer
Place the piece of material on the inside of your jeans, and pin in place from the outside.