tks, if you stay focused on Data Sufficiency questions for quant and boost your decision making abilities in the next couple of days, your GMAT score will only benefit from this. That was tip#1.
By pushing hard on quant questions 1-3 and 5-8 on the real thing, you will have access to your strongest area topics as David from Veritas Prep noted - work out your strongest areas. That would be tip#2.
Put down time grid on the exam note sheets. Strictly monitor the time; if you can not answer the question within 2-2.5 minutes, the probability that your answer will be correct is not in function with the time for GMAT purpose. Make the best guess and move on. That is counted as tip#3.
I am not aware if you are native English speaker or foreigner. Depending on this your strategy for tackling verbal should be defined.
Take a good sleep before exam. When we are tired, an impulse puts the strain on our brain. Tired people become impatient and allow for many silly mistakes.
good luck on your exam.
My knowledge frontiers came to evolve the GMATPill's methods - the credited study means to boost the Verbal competence. I really like their videos, especially for RC, CR and SC. You do check their study methods at
https://www.gmatpill.com