I ran out of film while on a deserted island. I set the ISO incorrectly on my OM-1, overexposing the roll by 2 stops. I opened the bottom of the Leica M7 before rewinding the roll. I had only a 28mm prime lens with me when what I needed was a telephoto. I was in fading light with nothing but Fuji PRO 160. Walgreens scratched one of the negatives during processing. The lens hood I used caused terrible vignetting. And so on. Oh, and I left a roll of exposed film in the pocket of a pair of shorts. it didn’t survive a trip through the laundry.
While I am upset that I lost 30 frames from two different photo excursions - one to the NY state border where I shot photos of bridges, and several frames from the waterfall and of a friend - I am trying to focus on the fact that I enjoyed the experience even if I lost those photos. Both days were lovely days and I really had a great time. I'm choosing to focus on that.