I think a thank you letter means the most.
A co-worker's daughter who I've known since she was a young girl is an emergency room nurse. She served in the Air Force in Ramstein as a medic before going to nursing school. So she'd dealt with the worst of the worst before nursing school which helped her really succeed in school.
She received a letter from an emergency room patient that she shared with her dad. Her dad shared it with us because it was so powerful. I don't recall the words but it essentially said, "thank you for being one of the few non-f'ups in the world because without you, I don't think I'd be alive right now" But it was written in a very moving way to where I even got a little misty
