Based on some things I've seen in the last 2 days, here are some lessons. This stuff is valuable, but I'm giving it free of charge.
1) Don't chew with your mouth open. And don't eat while riding on the elevator with others -- you can wait a couple minutes for your feeding. Particularly, don't chew your damn crunchy pretzels with your mouth open while you're on the elevator with me. OK, thanks.
1a) Don't smack your gum.
2) Don't clip your nails in public. Particularly, you shouldn't clip your toenails in public. Even more specifically, don't be a white-haired dude sitting in your baggy briefs in the gym locker room (by my locker) clipping your damn toenails while your junk hangs out your briefs. Nobody thinks that's OK.