I hate to plug my page, but if you want to start out shred, the modes are probably a great start - and the only thing I take pride in on my page is my tutorial on modes - check it out! Then after, move up to harmonic minor.
Ummm... click on the Yngwie button for inspiration on the main page.
Now I will tell you something that will get battered into your head in guitar playing until the day you die: start slowly with a metronome, and work your way up to a faster speed.
There are only two important things in life - There's music and theres girls, not necessarily in that order....
The Ace's Guitar Tricks