Maybe it's already been mentioned, but put your ****ing phone away while you're at a restaurant. I don't need to hear how little Joey wants to have a sleepover or how Uncle Dave got an infection that gave him serious diarrhea, especially while you're sitting next to me at Tepanyaki. Can we not have a phone free zone for an hour? And then the texts...
Or people who are in line at any type of store where there's a cashier, and they are talking 3x higher than anyone else in the store into their damn phone. If I were a cashier I'd just look past them and help the next person until the inconsiderate douche got off the phone.