Clean up the damaged space. Holes should be fully cleared by pushing a putty knife into the area to clear any loose debris. Ripped nail holes should be smoothed out by running a putty knife over the surface of the wall. Press dents until they stop giving. Cut away any loose paper using a utility knife.
Prep the area by running sandpaper over the surrounding surface of the damage and around the edges of the hole. Wipe it clean with a dry towel. Patch large holes using sheetrock mesh and following the manufacturer's directions.
Fill the hole with spackle using a putty knife. Scoop spackle onto the knife and force it into the hole until the hole is filled. Smooth away excess spackle with the flat end of the putty knife. Allow it to dry until it is hard to the touch. Spackle may shrink slightly when it dries, so you may notice a slight depression where you have filled the hole.
Blend additional spackle onto the damaged space and surrounding area by taking a small amount of spackle on the flat end of the putty knife and smoothing it over the hole, continuing past the hole a few inches. Run the putty knife over the area a few times without any putty on it to create a uniform surface. Allow this to dry completely.
Sand the surface lightly using 120-grit sandpaper. Continue sanding until the surface of the drywall and the surface of the filled hole are completely level. This may take some time but it is important to remove the excess spackle gradually to achieve a uniform appearance.
Paint the wall using a roller. Most drywall is painted using a roller, which leaves a light texture in the paint on the wall. This means that to get a continuous surface, you must repaint the wall using the same tool that was used to paint it originally. If your drywall was originally painted using a paintbrush, repaint the area using one. Allow the paint to dry until it is no longer tacky.
Apply a second coat of paint, extending the paint to the area around the repaired hole at least a foot. This provides a seamless transition from the old paint to the new.