If I've bought trip insurance (which I only may for foreign trips), I'll take a copy of T&C.

Consider downloading docs likes FF T&C to your PDA. Also, you could keep a few critical credit cards numbers (at least the phone numbers to call if lost or stolen) in a hidden, password-protected file on your PDA.

From a great travel book (which I would highly recommend for any first time international traveller) The Best European Travel Tips: take an extra pair of passport pics so that if your passport is lost, those can be used at a local embassay to get you a new passport quickly.

Also, if your state allows, consider getting an ID in addition to your DL. That way you have additional government issued ID should your primary ID get lost/stolen.