Here's my problem:

I generally keep my bags pretty organized, but on rare occasions I notice an empty slot buried deep in the section that I usually keep full. I am racking my brain trying to figure out what should go there. Did I use up some consumable that I forgot about? I find myself scanning through all my keybinds and itemrack sets to see if anything is missing.

Is there any addon that can help remedy this situation? Something that will remember what I had in a slot? I might have to resort to taking occasional screenshots, but with so many alts to keep track of that is gonna be tedious.