The Thrash Unlimited forum held a vote for the top 100 thrash metal albums (find it here on this thread).
Well, now you can hear a riff off of every album on the list thanks to the Thrash til Death channel on YouTube!
The 10 vids are quite an impressive endeavor. The poster named ThrashMetalRiffs, who compiled these, said these videos are "Great for new thrashers wanting to be introduced to new bands."
Check out video #1 here and move through the list.