LPT: If you drop something over a sink with no drain cover, don’t go for the object. Instead, go to cover the drain with your hand.

This is a VERY specific scenario but the second I programmed my brain into doing this I saved myself from having to dig down the drain to find a toothpaste cap. It’s a better plan that throwing your hands around trying to grab the object (Or... LPT stop being lazy and buy a plug).