I know this probably won't help very much, but really try to understand the stimulus. Know the conclusion (I mean, find the exact phrase/sentence, not just have an idea of the conclusion), understand the premises. Don't worry about the question type while you're reading the stimulus, because it distracts you. It will naturally begin to become obvious for many questions anyway, as you get more practice. Once you understand the stimulus, read the question stem, then proceed to the answer choices.
Also, I think most high scorers cross off the majority of wrong answer choices. Once you understand the stimulus, proceed to the answer choices and cross off the ones that you know are wrong. The ones that are hardest to spot are the wrong answers that are out of scope, or too strong/weak. Be very wary of "none" and "all" in answer choices, unless the question uses formal logic.
Sometimes this process leaves only one answer choice, in which case you circle it. Other times, it takes some careful consideration between two or three choices--regardless, you've drastically increased your chances of getting the question right. Sometimes you will cross off all of the choices. Then, it's time to go back through and mark an X through ones you KNOW are wrong, and reconsider ones you thought were wrong, but might actually be right.
Skip Parallel Reasoning questions (and maybe formal logic questions) until the very end. They just aren't worth the time. Carefully review and commit to memory the various "tests" the LRB offers for checking your answers on question types. Go through the "flaw in the reasoning" section, as well, focusing on the examples and common correct answer choices.
I also found that thinking about the time I had left severely distracted me. Don't worry about the clock, just keep moving through the section. All you have to do is answer the questions as fast as you can (accurately), and not get hung up. Maybe find a point to check the time, just to ensure you're on track (I tried to have 18-20 minutes left after answering question #13). If you do this, you should finish on time.
That's all the advice I can muster right now...hope it helps!