I may have screwed up....Need help

I had the same problem loosing parts as you are. I finally bought plastic totes for all my smaller parts. In the top of each tote I have a list of what is in it and the outside has a general description of what type of parts are in the tote. I am still finding parts hidden away and now they go to a tote immediately. It is amazing how many of the same parts I have bought because I forgot I had them.