Amazingly after going through the 3,200 questions.. a good handful where on the first 100 question state exam! I was very impressed. Check out http://www.lumbleau.com
If they have a few cd's of recorded questions they will be useful, but the habit of taking written practice tests will be a real benefit. Be ready to learn lots of stuff that is useless but will help you on Jeopardy.
As regards the benefit of a brokers license I would disagree with Ute and suggest that having it will give you greater flexibility to be of service to your clients and allow you to be able to disassociate AT WILL if the need arises for whatever reason. It is the ultimate hole card for anyone in our business.