I work in a high poverty urban school. Some days can be tough. When I notice a teacher overcoming an obstacle, I place a clean small rock in their mailbox with a U on it. I also place an uplifting note about what I noticed. At first they are confused about the rock. It means U rock. It gives them a much needed laugh when they figure it out and knowledge that someone appreciates their efforts. I don't let people know it's me, but they figure it out because I am known for my puns.