GMAT Verbal & Essays

Do you guys actually memorize the idioms?

I try to learn them through practice and flashcards

I'm creating flashcards for every idiom in MGMAT SC now (chap. 9). I don't expect to remember all the idioms, but I'll at least make an effort to try. We'll see how many of them sink in.

If you check Spidey's and Sahil's notes, you'll see that idioms can be a make-or-break issue on GMAT SC. Thus, they should not be neglected.

yes. memorize. Just be sure to use a gmat specific source; don't just research idioms on google because you'll end of with a LOT of idioms that don't appear on the test.