Remember how you felt, that day someone called you or wrote to you, totally out of the blue – just to say, thank you?
Here’s a suggestion: Take 5 minutes out of your day and be THAT PERSON, to someone else.
You may find this useful
Rather than tell someone that you appreciate what they did, tell them that you appreciate them. This small change in language massively increases the value of your message. It directs your gratitude to the person and not just their deed.