I worked a long shift today and was in a shitty mood because we were understaffed. My coworker/friend ended up coming in (on his day off) and totally turning the day around -- we laughed and I was able to relax a bit more.
I was studying at a coffee shop I go to pretty often, and I ordered twice a few hours from each other. The second time I went up, the barista remembered my name. Even though it was only a couple hours afterward, it was cool that she remembered despite the place being packed.