Our IT department at work is often "cursed" when the system goes bonkers. One day I noticed the IT guy in the drive through line behind me. I asked the clerk to let me pay for his meal and gave her a note to read...it simply said "It's be nice to your IT guy" day.
Later that day, he came over and told me it just made him smile because no one is usually nice to them. He has helped me out several times since then with little things when I've seen him ask others to hold on for awhile.
Another day at Subway (yes, I eat out a lot for lunch) I was running late for lunch so it was around 1:30. There was a Mom in there with 2 kids around 8 and 10. They were behind me in line so there was no rush of them picking out what they wanted. Well, I got my meal and was getting my drink when I heard the Mom say, oh no, she had left her wallet at home by the computer and they would have to come back for the sandwiches. Now it's late and I have heard them very politely talking about how much they were looking forward to the sandwich and they were hungry. They didn't make a fuss and they just sighed and said ok and all of them headed for their car.
They were parked next to me so I went up to the Mom while she was getting the kids into the car and handed her a $20. I also gave her my card and said if she was able to send it back, that would be great but not required. I explained I wanted her and the kids to have lunch now instead of in an hour (round trip had been discussed) because I was so impressed with how they had acted in line and also when they found out they had to wait longer for lunch. It was refreshing to not see a total meltdown from them.
In a few days, I got the nicest note from her and the $20 back. They were new to town and hadn't really felt welcomed but now realized they had moved to a town where people helped strangers and was looking forward to a good life in the area. I hope the other "locals" have also been nice.