We are guilty of doing things like that. I once was out shopping and had purchased a new purse. On my way out of the store, my eye was caught by some really pretty CZ rings so I slipped off my good ring and tried a couple on, ended up buying one. Then when I got home I changed to my new purse and threw the other one in a bag for Goodwill. Yep, you guessed it the next day my errands took me close to the Goodwill store and I dropped the stuff off. After wearing my CZ ring for a few days I went to get my good ring and realized it was in the purse I had taken to Good Will. I am not one to have good jewelry, just a few things, now minus one.
All of my friends save their clear bags that they purchase linens in and bed in a bag. I also work for a gift shop and we sell some throws and some how their bags don't also go home with the the new owner so I have quite a few clear bags. When I am transporting a quilt or a project I always put them in those bags so I can see what I have. I didn't know why I did that, just thought I was cheap, but now I know I'm really clever!!