I'm curious to know more about why you're finding the content boring. Are you struggling with any Geometry concepts, or are you simply struggling with some of the test taking strategies in your prep materials?
If you're struggling with entire concepts, consider taking a look at some courses at Khan Academy, which you can find here. https://www.khanacademy.org/
Additionally, if you're finding your prep materials a bit dry, here's a link to try Economist
GMAT Tutor for 7 days: http://bit.ly/1aKYX0U
. You'll find its adaptive technology is just like the adaptive nature of the actual GMAT and will cater your study plan to your specific needs.
Economist GMAT Tutor