Leaving carts outside the corrals at the store. Failing to signal. Actually a lot of car or car adjacent behaviors. All of which go back to “my immediate convenience is more important than being a conscientious member of the society I live in with other people.”
Safety razor user; I change every one to two shaves. If I start on that second use and it’s too rough for the shave I’ve got in mind (mostly a problem for my neck) then I’ll toss it.