I stick my email-address on all valuables I could conceivably lose. Just last month the police sent me a message about a camera found in the road with my address on it. I'd been wondering for weeks where I misplaced it. It must have fallen off when I passed there with my bicycle.
The poor thing must have seen at least one bout of rain and a lot of sun judging by the ablated jacket. And it still works perfectly!
I imagine the bigger concern is that it's pretty easy to social engineer your way into most online accounts with an email and the info from a drivers license.
Even better - put a photo or even a drawing of your face on the note as well, to try and evoke some empathy from the finder, increasing the chances it'll be returned to you.
Keep a note with your email address in your wallet - clearly marked "wallet owner's email".
Paranoid version of the life lesson:
Keep a note with an anonymized email address, with forwarding set up for the message to go to your actual mailbox, in your wallet.