The good news is that you had a pretty significant time management problem on the test. Why is that good news? Because it means we know what happened, so we can do something about it. :)
Read this and start doing what it says:
http://www.manhattangmat.com/blog/index ... anagement/If you want to uncover other specific weaknesses and discuss what to do about them, use the below article to analyze some recent MGMAT tests:
http://www.manhattangmat.com/blog/index ... ice-tests/Then come back and post your analysis here (not just the raw data - your actual analysis!).
The resources you mention are mostly practice problems. What did you use that taught you actual rules, facts, formulas, problem-solving techniques, etc?
Re: whether to take a prep course, and if so which one... well, I'm obviously biased. :) But I did write an article about how to decide this for yourself; see this:
http://www.beatthegmat.com/mba/2010/06/ ... s-or-tutorIf you want to find out more about our particular program, you can sit in on a class for free and/or call the office for more information.
And, of course, you can continue to ask questions here - the forums are free! (Though you may wait a little for a response.)