Song: Maggie M'Gill
Band: The Doors
Album: Morrison Hotel
Tuning: Standard

Alright, this is your normal blues riff in Amin

Intro:
G-------|
D-------|
A-------|
E-2-3-4-|

Main part (Amin)
G-----------------|
D-----------------|
A-----3-3-----3---|
E-5-5-----5-5--53-|


"She went down..." (D)
G---------------------|
D---------------------| 2x
A-5-5-5-5-5-5-5-5-3/5-|
E---------------------|
(Amin)
G-----------------|
D-----------------|
A-----3-3-----3---|
E-5-5-----5-5--53-|

(C)                     (D)
G---------------------|---------7-5---------|
D---------------------|-------------7--5----|
A-3-3-3-3-3-3-3-3-3-3-|-5-5-5-5-------------|
E---------------------|---------------------|

-Note what happens here on D, just down the scale from the octave
  to the 7th, 5th, then 4th...  just improv the pattern, sometimes hit 2...
   Also, after that D, it does a similar thing for the C

G-----------------|
D-----------------|
A-----3-3-5-5-3---|
E-5-5----------53-|

That's the general idea of the song..  
throw in a hint of jazz, and you'll be fine.