Put a couple of quarters on a gumball machine for a child to find, or put a dollar on a vending machine (especially in a hospital!) with a little note that says something like, "Enjoy this random act of kindness.". This is so fun!
Reach out to your neighbors. Bake loaves of banana bread, wrap and deliver them.
Send someone a little note, a thank you card. Thanksgiving is a great time of year to send a note to say thank you to someone who has been a help to you.