I don't know what your current routine is, but front squats seem to be the most important exercise for increasing the clean and jerk. I was browsing several
Olympic lifting sites and basically all of the articles pointed to the front squat as being the best assistant exercise for the clean and jerk.
But honestly there's not a lot that you can do in two weeks. I guess you could just try to incorporate heavy front squats this week, and then give yourself a little time to rest and recover for the meet.
If you're already doing heavy front squats, then you can disregard pretty much all of that.