Aside from napkins, something I throw out in the trash a good amount of times are receipts. It’s a wasteful habit of mine because although there are email or paper options, I always like to have paper receipts just in case( although nothing happens). Archaeologists might assume that I like to go out occasionally, and explore the areas I’m in. An incorrect assumption is probably that I’m a shopaholic, and can’t live without buying things. I’d say this is incorrect since the things I buy have a variety, usually food, clothes, or gifts.