If you're having a bad day, I highly recommend finding your finest local cafe, preferably one that serves breakfast, and sitting down next to someone who makes really loud lip-smacking noises while they eat.
Ideally, make sure your headphones have JUST enough battery charge to run out five minutes after you've blocked her out.
It's great. It is to minor misanthropy what "Everybody To The Limit" by Strong Bad is to an earworm. Nothing else matters now. My hatred has been purified.
@zebratron2084 There was the time I sat in the nice quiet room in the Espresso Vivace on Broadway and started grooving on soft but energetic music on my headphones and digging into some proofreading work... and ten minutes in, a couple guys decided the table in the middle was a conference table.
The temptation was to spend as much time as it took sucking loudly on the remnant of a nice, thick latte into which excess ice was slowly melting. I coulda got a good, annoying fifteen minutes at least.