A Once-In-A-Lifetime Chance

[bobquasit]

Say you were given a once-in-a-lifetime chance to send a message back through time to yourself at an earlier age. It can be up to five words. Your past self will know that the words came from future you. Paradox does not apply; if your past self acts on those words in any way, it will not negate your sending of them. But your life as it is now may change.

Question #1: How old would you be when you receive the message? That is, what age "you" would you send the message to?

Question #2: What would the message be?

I'm still thinking about my answers. I'll post them once I come up with them.