Delay GMAT to allow for proper study. If that not possible here are my thoughts below which might be useful:
Increase time available to study this could include taking annual leave, reducing social life, restrict work hours to what's in contract. Studying in morning before work.
Get some good study materials. The offical guide is not going to help. Most people like the manhattan study guides. Other options include private tutoring and online GMAT courses. The forum can provide some support on what are good guides and online courses in this area.
Identify weak areas and focus on them.
Create a study timetable; GMAT pill
publish one month study plans.
Create some space for relaxation to reduce stress.
For AWA try the template by Chinese burn. Should be able to obtain it on the forum.
Good luckPosted from my mobile device