GMAT Strategy

I'm trying to offset a low gpa, so i'm really trying to score as I possibly can on the GMAT. I plan to take the exam May1st or May 15th.

I took 3 mgmat exams and here are my scores in order(taken 1 exam per week):

420(24Q 26V)
460(26Q 28V)
450(24Q 29V).

dont know what to make of this, but hovering in the 400's for 3 weeks is definitely not a good sign.

this is what I have been doing:
-I have already gone through OG math, official OG, and og verbal, mgmat sc. I have been going through each question that I missed and really making sure I understood every problem(sometimes, it takes me 1 hour to go through only 1 page of problems).

-taking one exam per week
-reading articles from the resources listed on on this site
-reviewing questions posted on this site.
-weekdays I study 1.5 to 2 hours per night
-weekends I study 2 to 4 hours per day.

Not sure what else I need to do besides the above. I may be considering taking 2 exams per week.

I'm guessing I just need to continue trucking along. Any one have any suggestions based on my scores above?

i think your study comes down to quantity vs quality. you mentioned you study a few hours a day and longer on the weekends. what are you focusing on? you should analyze all of the wrong and right answers.

for example, you mentioned you study for 2-4 hours on the weekend i recommend you spend 1.5 hours actually working on problems and 2.5 hours reviewing the answers etc.

keep a log of your work, then periodically go back to your log to see if there are any subjects you need to brush up on