Use these techniques for holes in drywall that are more than 3 inches across. Alternatively, for holes up to about 8-inches across, purchase a large repair patch at a hardware store or home center. The patch is a mesh panel with self-adhesive edges that hold it in place. The panel bridges the hole and serves as a base for the joint compound.
Time: 30 minutes of actual work, plus drying time.
Skills: Basic to intermediate skills, particularly if you need to tape the repair.
Tools: Taping knives, keyhole saw or drywall saw, hammer, drill, utility knife, sanding block or sponge, paintbrush.
Expert's Insight: To cut drywall without cutting the paper, score the sheet from the back using a sharp drywall knife. Place the drywall scored side up over the edge of a table and snap the piece downward. Carefully peel the cut portion away from the paper facing.
Step-by-Step
1. Cut around damage.

For holes up to 8 inches, mark a rectangle and cut it out with a keyhole saw.
2. Fashion a patch.

Cut a drywall rectangle 2 inches larger than the hole. Remove 2-inch perimeter, but leaving facing paper.
3. Apply compound.

Spread compound around the damaged area. Also, butter its inside edges to serve as an adhesive.
4. Insert patch

Insert patch, smooth down, and hold in place for a few minutes. Blend in by feathering with compound.
5. Use studs for support.

For larger holes, cut area to centers of adjoining studs. Toenail 2x2s to top and bottom to use as nailers.
6. Finish.

Nail or screw in the patch, tape, and smooth. You'll need three coats of compound for a good job. Sand, smooth, then prime and paint.

