I met my neighbour last week at a home improvement store and he shared stories about the remodeling going on in his kitchen.
This week, as I was sorting through the mail, I noticed a $10 gift card from the same store. I dropped the rest of the mail, bundled up the gift card with a smile card, walked over and put it in his mail slot.
The whole thing took me only 2 minutes but it was immensely satisfying to do this spontaneously. With all the big purchases my neighbour has to make, I hope this small break brings him a smile.