As a kid, people always said the way to remember that stalagmites were on the bottoms of caves and stalactites were on the top was that stalactites “had to stick tight to the tops of caves.”
This never made sense to me though, since one could also just as reasonably say that stalagmites have to use might to stick to the tops of caves, if that was what they actually did. Because of this, I never remember right from might from the whole “stick tight” thing.
Instead, I, being the counterintuitive weirdo I am, remembered them by remembering the fact that I thought that the saying people used to remember it was really dumb.