Question special

Thanks to all the chiefs for joining us! I've been hearing a lot of "no one expects you to know anything!" over the last couple of weeks. I imagine there are going to be occasions (especially in the ED and on the floor) where we'll be expected to make independent decisions about initially-scary (but actually basic) things that will eventually become second nature to us, and it might feel embarrassing to ask some things that we feel like we should just "know". Can you think of some of those basic things that you find your interns often don't remember/need to relearn? (I'm thinking about the 4-2-1 rule for replenishing fluids on peds, for example). How did you keep straight all those little factoids until you memorized them?