repairing a hole in a plaster wall

Here are some steps you can take to repair a hole in a plaster wall:
Clean: Remove any loose debris from the hole
Fill: Use a filler made for hairline cracks to fill the hole
Sand: Once the filler is dry, sand it down
Apply another layer: Apply a thin layer of filler and let it dry before sanding again
Paint: Apply a mist coat of paint to blend the repair into the wall