The biggest problem people have with the analytical questions is not that they're hard, but that they take too much time. The only way to improve your speed on the analytical problems is to get used to the kinds of questions asked and practice.
When you read the rules to a logic problem, immediately write ALL of the rules down on your scratch paper before you try to answer any questions. Find the connections between the rules and map it all out, drawing pictures if necessary. It speeds things up enormously.
Abbreviate things. If given the names of colors, people, rivers, whatever, just use the first letter.
Never assume anything unless you're explicitly told it's so. The analytical section is basically testing if you jump to unfounded assumptions or not. Prove that you're a "not" and follow exactly what the rules tell you to do.
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amius47 said
on 10/11/2009 Another site for free GRE practice exams is catprep.com