Hi cat2010.
14 days is not a lot of time to achieve a 70-point score increase. So, you may need more time to achieve your goal. All the same, while I don't have a specific study plan for increasing your score as much as possible in 14 days, I can give you some ideas regarding what you can do to have your best possible shot at achieving your score goal in that amount of time.
The best way to increase your GMAT score is to strengthen your skills in one topic at a time while also improving your skill in getting questions correct and being accurate in general. So, in general, your plan could be to start with one quant topic and one verbal topic to master, and then, once you've become pretty strong in both of those topics, to move on to another quant topic and another verbal topic and do the same thing.
To master a topic, you
- first, review the relevant concepts and strategies
- then do practice questions involving that topic UNTIMED until you're achieving high accuracy
- finally, work on reducing the time per question until you're correctly answering questions involving that topic at test pace
For some specifics on how to increase your quant and verbal scores, see these posts.
How to Increase Your GMAT Quant Score: Top 25 TipsHow to Score High on GMAT VerbalAlso, to learn how to reduce the number of careless errors you make and improve overall accuracy, see this one.
Improving Your Accuracy on the GMATAlso, after you have prepare for a few days, I recommend taking an official practice test from mba.com to get a sense of where you stand since those official practice tests best represent the actual GMAT and provide the most accurate indications of how you'd score on the GMAT.