Hi erolimes,
Although you did not clearly state it - are you taking the OFFICIAL GMAT on Thursday or another practice CAT?
If it is your official GMAT, then we're so close to Test Day that you can't really try to 'cram' in any new tactics. You also can't pay the $50 rescheduling fee and push your Test Date back. In these last few days, you should focus on light review, identifying any silly/little mistakes that you tend to make and get in some repetitions (so that you can try to eliminate the mistakes) and try to get some rest. Do NOT take any more CATs and don't try to over-do your studies. You'll be better served by going into Test Day rested and ready to work.
GMAT assassins aren't born, they're made,
Rich