You have the right materials; the OG, GMATPrep and PR are great. You definitely need to stick to a tighter schedule if you want to see improvement. I agree that you should mix up verbal and quant. Do enough practice questions for each type at a time so you can pick up patterns in your errors. Are yo...

There is a free one on Princeton Review's Web site: http://www.princetonreview.com/business/free-gmat-practice-test.aspx?uidbadge= From everything I have read in the forums, Kaplan is both a lot harder than the real GMAT, and the scoring algorithm is off, so your Kaplan scores will be a lot lower th...

I am doing Princeton Review's online course, and I would definitely recommend it. The lessons are based on my performance (i.e. weak spots get more attention), although I can do any of the drills anytime, but I really like having them customized. The online instructor chat is very cool and helps a L...

When you take the real GMAT, they're going to mix it up, so you should too. Get into a good enough groove where you're able to find and tackle weaknesses and common mistakes for one question type, then move on to the next type after you're feeling confident.

The Powerprep tests are too old to be useful, and they aren't truly adaptive, so I really wouldn't bother with those. They could throw you off.

Four hours a day on weekdays might be a bit too much, esp if you work full-time, but otherwise your strategy and materials list sound good.

I haven't heard too much about Veritas' tests but am surprised at it being 150 points lower than GMATPrep and PR. I thought GMATPrep and PR were pretty accurate, so I'd stick with those if Veritas is that far off.