CBS This Morning is doing a cool new feature called "Note to Self." The premise: If you could offer insight and advice to a younger you, what would you say? I've said the phrase myself, "If I only knew then what I know now!"

Check out this moving video of Dale Earnhardt Jr. where he write a letter to himself. It's pretty powerful and may make you think differently about No. 88, for sure.

The question is: Have you ever thought about it? What would you say to yourself?