Okay, here's something I've been wondering about for a while. When we go to dinner, I usually tip the waitress 20%. I usually tip pizza delivery people a few dollars. Other than that, I have no idea what to tip or even if I'm supposed to tip. (I hope the FI takes care of it.)
What about carhops at places like Sonic - tip or not?
Hotel maids - how much?
How about the rare occassions at the supermarket when the young guy bagging your groceries carries them out to your vehicle and loads them for you - tip or not, and if so, how much?
Be kinder than necessary because everyone you meet is fighting some kind of battle.