Here is a shred column I do for another forum. I discuss different aspects of shred, and will be going over some basic "picking mechanics" and then put the basic mechanics into more advanced patterns. Every once and awhile I dissect solos and explain how to go about practicing them. I don't have samples so as to be more of a instructional guide, rather than a Limitation or a basis (sense we each have our own tone).
http://www.kissfaq.com/bored/viewtopic.php?t=10785

Lastly, if you don't think about playing at all, I find I play faster than if I go "okay, I want to play fast" or "okay, fast scalar run here". Just relax, and have fun.