I think you should masturbate a little more and that will lead to better sex. Having the ability to relax and to pleasure yourself is important for mental well-being, for sexual exploration, and for ultimate comfort when actually being with a partner. The more we know about our particular bodies, and what turns us on, off, and everything in between, the better we will be able to work towards reaching higher and higher climaxes. You should try some toys maybe this one http://blissfulgoodies.com/Speeding-Bullets-Armor-Piercing-Purple/sku-ENAI000102?a=artificial_vagina It's really cheap($7) and easy to use.
Another Idea: I recently read this... My boyfriend does this amazing thing where he lays beside me and touches me to get me really wet. When I'm getting close to orgasming for the first time (yes, he makes me *** more than once), he puts himself inside of me, staying on my side. From this angle he can touch me and be inside of me at the same time, which makes me just go crazy. This benefits him as well, as once I've *** the first time I'm extra lubed up, and then we can focus on him. I think this is a great technique you should try out. I found this technique here http://goarticles.com/article/How-to-Satisfy-Your-Girlfriend/6648052/