If you are already hitting your target score in GMAT prep tests, then in the final week -
1) relax and take it easy
2) eat healthy and stay active
3) review some of the concepts and maybe do a few questions if you want - but keep it light
4) don’t take any full length tests
5) create a list of items you may need for test day, and go buy them
6) visit the test center in advance to get acquainted to the surroundings (this is optional, but really helped me)
7) finalize your test taking strategy - setting up scratch pad before exam, tracking time during exam etc
8) rest well before the exam
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