Several things. First, that thing about the early questions is a myth - they are not worth more and you are killing your score by running out of time at the end. Log into your student center and read the Scoring section of our e-book The GMAT Uncovered. If you keep doing what you've been doing with respect to the timing, your score is not going to get better!
This article talks about timing:
http://www.beatthegmat.com/mba/2009/12/ ... managementI think you would also benefit from a timing exercise: learning about how long one minute is without looking at a watch or stopwatch. If you don't have one already, buy yourself a stopwatch with lap timing capability. When you go to do a set of problems, start the stopwatch but turn it over so you can't see the time. Every time you think you're one minute into a new problem, push the lap button. When you're done with that problem, push the lap button again, then repeat the process for the next problem. When you're done with the set, see how good you were - and whether you tend to over or underestimate. Get yourself to the point where you're within 15 seconds either way on a regular basis (that is, you can generally predict between 45 sec and 1min 15 sec). Also check your timing for the entire question, of course.
Now, how do you use that when doing problems? If you're not on track by one minute*, make an educated guess** and move on. (The general idea is that if you're not on track by the halfway mark, you're unlikely to figure out what's holding you back AND have time to do the whole problem in the 1 min you have left.)
* For SC, 1min is well beyond the half-way mark (we're supposed to average about 1m15s here), but you can almost always eliminate at least some choices on SC in that timeframe. Once you've got that "I'm around the 1min mark and I'm struggling" feeling, go through any remaining choices ONCE more. Pick one. Move on.
** This also requires you to know HOW to make an educated guess depending upon the type of problem and the content being tested. So that's something else to add to your study: how to make educated guesses on different kinds of problems.
Here are a couple of articles on educated guessing:
http://www.beatthegmat.com/mba/2010/07/ ... s-on-quanthttp://www.manhattangmat.com/articles/e ... verbal.cfmRe: where and how you're studying, it's actually good for your brain to study in different places / formats, and not always to study in the perfect, sterile, quiet environment. If you're literally getting interrupted / distracted every minute, that's not so good. At work, can you hang a sign on your door or cube that says, "Studying! Please don't interrupt me right now!"
Take a look at this article:
http://www.beatthegmat.com/mba/2010/09/ ... your-studyCan you go someplace else at lunch to study? Can you study in the morning before you go to work? Can you study while you're listening to music (so that you're not hearing others so much)? Do you have a smartphone? We've got flashcards and those sorts of things - they might be easier to do on the train.
I would also love to hear from others what they do!
Okay, now that we've covered everything that you asked (I think! hopefully I hit it all...), take a look at this article:
http://www.beatthegmat.com/mba/2010/02/ ... study-planIt talks about how to set up a study plan. That article basically contains everything I would advise you to do to get started on your next round of studying. For the part that talks about analyzing your practice test(s), you can also come back here after doing that analysis and we'll help you figure out more specific things to do based upon your strengths and weaknesses.