Back in the day, a friend’s passport was stolen while we were on our semester abroad. It was no easy task to replace it 5000 miles from home in those pre-internet (!) times. Just a few years ago, my husband almost missed our flight from Cairo to Amman because he did not have a copy of his itinerary, something he hadn’t realized he would need in addition to his e-ticket. Even in these virtual document days, it’s a good idea to have a printed copy of all important documents. I leave a photocopy of my passport with a friend or family and keep a copy in my suitcase.
In addition, I keep a copy of key passport and visa pages in the cloud and on my phone (password protected). While traveling, I snap photos of my baggage claim checks, lost luggage reports (very useful on my most recent trip), VAT forms and receipts for expense reports (and can be fun additions to slide shows). While I might err on the side of being overly cautious, storage is cheap and mistakes are not! As my father-in-law used to say: prior planning prevents poor performance (more about travel prep based on those words of wisdom here).