GMAT - Please advise.

Guys below are my Kaplan scores. No very impressive. I started my GMAT prep for the 3rd time a month back. I worked through the Kaplan 2008 edition completely. And each weekend i have been giving a test to assess me. I have noticed one particular thing. In Maths my average i could answer only 30/37 and English 25/41. The rest i would simply tick it inorder to complete the paper. To my astonishment i would never get anything right which i tick at the last . So the test scores tells my performance acurately.

Kaplan CAT 1 350 29 8
Kaplan CAT 2 550 36 28
Kaplan CAT 3 480 33 17
Kaplan CAT 4 500 25 26

Now Guys to my knowledge i have done a lot of practise. English i am slow and i am not sure how to proceed. I am trying to reading novel suggested in the forum to improve my reading on the whole. Maths i know i am good but not able to deliver on the exams. I just need to know if i am proceeding in the right direction. I have decided to schedule my GMAT exams 2 months form now so that i know my deadlines and try to achieve it. Please advise if it is ok. I need to get a good score.

I have gone through the OG10 DS and OG PS. Progressing with RC,CR,SC.

Next i have planned to Work Princeton Work book and Complete its set of Test.
Then GMAT club Tests, OG Tests.

Please advise if any change in the Game plan i can make. I am moving blindly with just hope that this time i can make it. I need ur guidance so i can conquer this battle.