Not one that I tend to use in everyday life, but one I really like.
“You’ve gotta’ dance like there’s nobody watching,
Love like you’ll never be hurt,
Sing like there’s nobody listening,
And live like it’s heaven on earth.
(And speak from the heart to be heard.)”
-William W. Purkey
I’ve seen this included in longer texts before, or slightly changed, but Purkey is the source of these particular lines. He used it to close all his speeches.