The morning after the wooded zero, I repacked my rucksack twice looking for things. First, it was for my journal then for my tent stakes. Later, I paniced as I went over the VT/NH bridge fearing I left my SPOT at the shelter. I even made contingency plans to try to get it without hiking 11 miles back the way I came. Most recently, I left two tent stakes behind.
Routine is the way I prevent loosing things out here. Everything has a place in the pack. Everything has a place in camp. It's when the routine gets up set that things go missing. Most of the time loss of something is only temporary. I'll find it because I didn't remember to place it in that spot instead placing it elsewhere.