How often are you throwing “EDH staples” into your decks?

Staples really just referring to cards that fit into any deck. Outside of one deck, I’ve personally been taking out things like free spells and non-themed tutors (ie. Buried alive in zombie tribal gets to stay). No matter the power level I’m playing at. However, I know there are people that essentially treat them as lands when building decks (as in they already have a pre-taken spot in the deck.. not actually replacing lands).

So, how often are you actually using them? Love to hear what other people think/do when deck building.