From what you've described, timing is obviously one major factor - having to answer 8 questions in 10 minutes definitely brought your score down.
First, here are the average guidelines you should be following:
Quant - about 2m; max of 2.5m
SC - about 60-75 sec; max of 90-100 sec
CR - about 2m; max of 2.5m
RC - about 2.5m (short) to 3.5m (long) to read; about 1 min for general purpose questions; about 1.5 to 2 for everything else
Go look at recent practice tests and figure out where you tend to spend too much time; if you know where you're losing time, that's half the battle when trying to stop yourself from doing that in the future.
Then, for verbal, use this process:
1st pass through answers: place answers into 1 of 2 categories, definitely wrong or maybe. DO NOT decide whether something is right at this stage.
2nd pass through: look only at the "maybe" answers, compare to each other or to "proof" text (if it's that kind of question), choose one
When you are down to two answers on verbal, look at each answer ONCE more, then pick one and move on. DO NOT agonize back and forth between two answers.
In terms of specific content - what and how to study - I need more data on your strengths and weaknesses. Use the below article to analyze a recent practice test and then come back and tell us your analysis:
http://www.beatthegmat.com/mba/2011/02/ ... sts-part-1(Note: don't just list the data - do the analysis and tell us what you think.)