In addition to the excellent advice in the previous post, I will also add my two cents to this.
You might be interested in this blog I wrote, about practicing GMAT questions with time constraints in place:http://magoosh.com/gmat/2012/pacing-and ... -the-gmat/
In the post above, GMATLA
said: "Improving you speed comes from learning how to address different question types
." I couldn't agree more. Because of this, I would highly recommend checking out Magoosh
test prep. We have 200+ videos covering all the content & strategy you will need on the GMAT, and one of our specialties is recommending strategies that save students time and allow them to work more efficiently with precision. Magoosh
offers high quality GMAT prep at a mere fraction of the cost of the alternatives.
Here's a sample lesson, showing a particularly efficient math strategy:http://gmat.magoosh.com/lessons/311-dou ... nd-halving
Here's a sample SC question:http://gmat.magoosh.com/questions/1081
Each of our 800+ has its own explanation video. When you submit your answer to the question, the explanation video will come up on the next page.
I hope this is helpful. Please let me know if you have any further questions.
Magoosh Test Prep