I saw a similar question asked somewhere (possibly here, though I'm not about to be that "marked as duplicate" guy), and I suggested the post-it method already mentioned. Someone else then commented that he worked in a clean-room environment where atmospheric dust was a problem, and they used shaving foam(!). Position the drill, spray some shaving foam on/around the drill tip, and go.

I saw a similar question asked somewhere (possibly here, though I'm not about to be that "marked as duplicate" guy), and I suggested the post-it method already mentioned. Someone else then commented that he worked in a clean-room environment where atmospheric dust was a problem, and they used shaving foam(!): Position the drill, spray some shaving foam on/around the drill tip, and go.