A tip that I read somewhere on line... don't remember if it was here or elsewhere. Scan all your important travel documents into a PDF file, and email that file to yourself, or upload it onto Google Docs. If you carry any kind of PDA phone (I keep mine on me even on vacation because it's got a decent camera) you can store it on the memory of that device. Same for a lot of EReaders I am sure. At least this way if you misplace the original, as long as you can get online, you'll be able to make copies of these documents. No they're not the original, but having a scan of your passport can go a long way in getting a replacement when travelling.
Disney Dream - Dec 2012 4n Bahamas
Carnival Imagination - Dec 2011 4n Western
Carnival Imagination - Nov 2010 4n Western
Costa Atlantica - Dec 2009 7n Eastern
My opinions are mine and mine alone. They do not represent the opinions of The Walt Disney Company nor any of its subsidiaries.