Welcome to GMAT club Here are some links that should help yougmat-study-plan-how-to-start-your-gmat-prep-80727.htmlbest-gmat-books-118706.htmlbest-verbal-gmat-books-120308.htmlbest-gmat-math-prep-books-reviews-recommendations-77291.htmlgmat-prep-analysis-tool-102803.htmlun-scientific-analysis-of-gmatprep-64970.html
The forum is currently celeberation 10 years and 1 million posts so there are some videos that should help you in your preperations.gmat-club-s-10-years-1-000-000-posts-milestone-learnmore-141955.html
If you plan to join gmat prep course and need their reviews http://gmatclub.com/reviews/?fl=menu
Free CAT's all-gmat-cat-practice-tests-links-prices-reviews-77460.html?fl=menu
free video solutions from OG 13
also check out bunuel's question in the quant section very good collection.
Those links should help you.
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Create a login and try 500+ questions for free - http://www.gmatpill.com/gmat-practice-test/
Amazing free video solutions for OG 12,13,quant review etc - http://www.gmatquantum.com/