I was at the New York Gift Show today and saw tons of cool products for weddings. I came across a journal, notebook and planner by Ecosystem. Besides being eco-friendly each journal, notebook and planner has an ID number that you can use to find out all the manufacturing details and track your book if it's lost.
If you lose your book (of course you'll have to write down the number somewhere) you enter the ID number into the company's Web site's "Lost" section and if someone finds your book they can enter the ID into the "Found" section and they'll recover your book for you.
I think this is a great idea and highly recommend you have your contact information in your wedding organizer or planning notebook. You don't have to put all of your personal info in it but your email should be fine and in case you leave your wedding organizer at a vendor or a store someone will find it and be able to email you that they have it.