You're asking a very general question. They could write books that answer your question...oh, they did. Lots of them. You'll get a better response if you ask a more specific question.
By the way...I'm working on a GMATClub Beginner's Guide to taking the GMAT. I hope to have it ready in a week or two. It will be about 15-20 pages, and that's just the nuts and bolts of stuff that people here talk about the most.
Since your exam is in 3 days...you're not likely to do anything in the next 3 days to drastically improve your score. Actually, the best advice right now would be get some sleep, and lot of it. There is no better way to make your mind work well than give it rest.
jfranco23
I’m going to take my GMAT on Thursday, any advise from recent takers? Thanks