Pay for someone.
Pay for someone's groceries, lunch, utility bill, whatever comes to you in the situation. Get creative. I know you can think of 100 ways just on this point alone.
Here's my personal experience: I was at the airport and in a hurry (but of course!) and very hungry. I stopped at a eatery to get something to eat before boarding on my flight. My credit card was declined! I was embarrassed and didn't know what to do. A lady behind me in line offered to pay for my lunch! I thanked her and asked for her information, (I wanted repay her) she refused. She said, "just do the same for someone one else." Wow, that blew me away. I have never forgot her kindness either.
So there is my story please, tell me yours!