Went to a far away island in minecraft only to figure out that I didn't bring any armor, nor weapons nor torches with me. Went all the way back to my house only to remember that I had left a chest on the far away island that contained everything I needed, since I put that there for when I want to explore on the island. Went back to the island, and guess what, there was no chest, turns out I planned to put that chest there, but didn't actually do it, though I thought I already did.
And, I never played more than 20 minutes straight of amnesia the dark descent, always had to take a break.