Before drilling into drywall, the key checks are wall type, possible stud location, hidden services, mount weight, and whether the chosen anchor system matches the job.
Drywall anchor choice should follow realistic load, leverage, and wall condition, because a light picture, a shelf bracket, and a pulled-on wall hook do not stress the wall in the same way.
Small drywall hole repair works best when the patch method matches the hole size and the finish expectations of the room instead of relying on too much filler alone.