When working with tiny, easy to drop plumbing pieces over the sink, put the drain plug in before you start. 
When drilling a hole in a wall, crease a Post-It note and stick it to the wall under the drill hole. It will catch the wall dust.
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Same concept, but I stick an envelope underneath. Your way is cheaper and easier.
I’m not sure if I’ve been a serious jerk IRL all my life or if it’s just been something more recent. I wish my so-called “friends” had told me 40 years ago.
IME, most jerks are fairly proud of being jerks. So if you are unsure about it, you probably were not a jerk.