I spent roughly six months @ 1-2 hours per day studying for the comp exam, but took my Capstone in the same month. Before starting on the Capstone, I was getting really strong on the material, but the two stretched me just a little thin. I passed all four modules, but it still isn't an advisable strategy. I'd try to keep a somewhat clear schedule in the month or so before your exam so that you can really focus on this. A long period of time with short to moderate study sessions is preferable to starting to study a week or two in advance for 8-hours per day.
First thing to do is to review every single one of your AI course handbooks. Actually, if you have taken a residential class, a class on green construction, etc., maybe don't bother with those, but all of the standard QE needed for both your CG license and MAI. If you are weak on a certain spot, focus on that. Then, review the material from the course handbooks all over again. After that, you could go one of two ways-I purchased Ted Whitmer's MAI prep book, but didn't attend his class. You could do that or attend the class. Or, John Urubek has a class to take. If you are deciding between which to attend, I've heard positive feedback for Urubek's course and he is a good instructor, though again, I didn't take either so I can't personally vouch for them, But, if you don't want to take a week off to take those, purchase Whitmer's book. Honestly, I wouldn't have passed without that book. Although some of the quiz questions seemed a little off-the-wall, the actual exam questions are also. I got a little sick of Whitmer's style towards the end and went back to studying the course handbooks, but if I did it over again, I would have put more emphasis on Whitmer's book. There are exam questions that isn't covered in the AI course books that are in this book.
Good luck