Here is a little riff I came across when I was playing
Ice Cream Man By Van Halen.  I figured that you could use
It to end almost any type of blues song.  It sounds 
Great distorted or Clean, Give it a try.

E----------------------------------------------7---6---------------------
B----------------------------------------------7---6---------------------
G----------------------------------------------7---6---------------------
D----------------------------------------------6---5---------------------
A------7-7---5-5---4--4--3--3---3---3trill5------------------------------
E---x--------------------------------------------------------------------

Van Halen adds a crazy Solo after their version, but You can add your
Own solo.

Rate it what you want, I thought it was cool.