Review your error log
( excel file or your markings on the books) and resolve questions that you got wrong. If u get them wrong again than go through the relevant concepts.
Take full length tests including AWA and IR under test center like conditions. I recommend to take at least 4 full length tests so that your are perfectly prepared for the actual GMAT exam. I totally agree with ashkul123 that for AWA chineseburned's template is sufficient. I used his template and got a 5.0
Do not worry to much about IR. Practice from GMATprep software.
Do not take too much load one day before the exam. Just revise the formulas and important concepts, and yes, take a good sleep before the exam.
Remember your state of mind during the GMAT exam is very important in determining your score. Do not waste your 3 month's hard work by worrying too much one day before the exam.
Kindly consider for kudos if my post was helpful!