Jon is right on here. The Tech test is not challenging even if you are not a good test taker. They tell you in advance the questions and all of the answers. I thought the pool was 300 questions deep but Jon may be correct that now it's only 100.
I found the best study guide was Hamtestonline. You have to pay for it though, but it made the tech test a breeze. There are lots of free tests out there but without the background provided on Hamtestonline. It's actually fun to use.
The tech pool is 394 questions.
Another good study guide is http://www.eham.net/exams/