GMAT Strategy

Hi
I have about 4 months before i take my GMAT. I have an engineering background however not in touch with too much math as its been years since i finished school.
Quant is the section that i really want to prepare well in addition to other section.
I brushed up some math basics and took Gmat Prep test 1. I scored 560.
I got 18 answers wrong in Quant and 19 wrong in Verbal.
Verbal - weak area is sentence correction which i plan to tackel after i gain more confidence in Quant section.
Quant - Most of my errors were careless mistakes and i need to increase my speed as well.By the end of Quant section , i had to guess 3 questios as i was left with just 1 min.

I have bought OG edition 11 and Kplan 800.
Please help me to device a study plan. I want to score 700 +. Is it possible or am i aiming too high??
I work, so can afford 1 hr on weekdays and more time on weekends.

I really want to increase my score.Please advice how?
I am doing self study.
Here is a break down of how i feel about each area:
PS: need to reduce making careless mistakes and increase speed.
DS: I am okay with this, need to avoid careless mistakes.
RC: comfortable
SC: Even though i am an english speaker, this section really gets me !
CR: I think i can handle this, just need to keep practicing.
AWA: will handle in the last month before the test.

Please also suggest if i need to get more material (books/practice test etc)
I really want to get 700+ Hope its possible when i am starting with 560 (gmatprep test 1)

Please Advice.