This is a brilliant scale to improvise on when playing blues, sounds really good. 

e-------------------------------------0-------------------------------------|
B-------------------------------0--3-----3--0-------------------------------|
G----------------------0--2--3-----------------3--2--0----------------------|
D----------------0--2-----------------------------------2--0----------------|
A-------0--1--2-----------------------------------------------2--1--0-------|
E--0--3----------------------------------------------------------------3--0-|

You can use this for any key by just moving it up the fretboard, enjoy.