Upholstery webbing will eventually wear out over time, which can cause the cushions to sag or the springs to begin to poke through the cushions. When this happens, replace the webbing carefully by stapling it to the couch's wooden frame and by using a webbing stretcher to ensure the webbing is taught but not too tight. This process is one of the simpler ones you can undertake to repair your upholstery.
Piping can wear out, especially on the arms and back of a couch, which happens when your arms and back rub up against the piping. To repair it, undo the seams around the piping and remove the piping. Recover it with new cloth and hand sew the fabric seams to the couch to hold the piping in place.
Couch cushions can get ripped, snagged or stained. You can try to flip the couch cushion, but if you've ruined both sides, you'll need to reupholster the couch cushion. To do this, remove the cushion covers and re-sew new ones with a sewing machine fitted with an upholstery needle.
If you catch your ring or an object on your upholstery, it could snag it. These snag loops can make your couch look old. To repair the snags, press your fingers on both sides of the snag until you work the loop back into the couch. If this doesn't work, grasp the loop with a snag needle and press it into the upholstery so that it is on the other side of the fabric.