In part two, we'll focus on bigger holes
Cut Drywall Bigger Than Hole
Cut a square piece of drywall that's bigger than the hole you need to repair.
Trace Around Hole
Trace around the square piece with a pencil
Cut Along Lines
Use a keyhole saw or a reciprocating saw to cut out the square piece
Screw In 2x3's
Make sure the wood is long enough to go past the hole, then hold it flush to the opening, and screw it in on top and bottom. Do the same thing for the other side. This is where the piece of drywall will sit.
Screw Drywall & Tape
Seat the cut-out piece in the hole, then screw it in to the wood. Then use fiberglass mesh tape to cover the cracks and screws. DO NOT overlap the fiberglass mesh tape.
Apply Mud, Sand & Paint
Apply joint compound evenly, covering the tape. When it dries (it turns white), sand it down, and paint over it. Enjoy!