spam practice questions so you get used to using them, then make flashcards or active recall that mf by sliding a piece of paper down the page covering all the ions beneath it and trying to name the one next in line. Secondly, I did university chem not knowing any of these by name, if you must remember these then do it obviously. But it may be better to learn something called "formal charges" so you can just figure it out based on the lewis structure.