Typically, we fool proof for logic games, but is there any way we can methodically be successful at LR?

Hello all, I'm having a bit of trouble parsing out the language I find in any NA question stimulus. I often have to take bullet notes or diagram, which can be a waste of time on test day. Anyone have tips on how to parse out the language in a quicker manner? Many thanks in advance! I also understand that a NA is what has to be true if the conclusion is true (read from Ellen Cassidy Loophole). But I've also had a tutor tell me that an NA question is a premise that will make the conclusion potentially valid. So, I understand what a necessary assumption is, but I can't quite grasp the concept fully.

Are there any phrases/key words/types of the rules I should be on the lookout for on the LG section? How do you guys know when to split a gameboard? Thanks in advance!

If aliens landed on the moon tomorrow, and we ate purple pancakes on Monday, what size shoe does your great grand uncle twice remove wear?

Note: Sorry I just had to post this because I got so frustrated with getting Necessary Assumption questions wrong.