Tuning: GGDGBD (bottom E goes up to a G) or GGDGGB.

Make sure the top 3 strings are perfectly in tune with the rest of
the guitar, even though they are not played; their strong resonance
is vital.

If your fingering is so good (or guitar neck so wide) that you never
catch open strings with your fretting finger, GGDGBD will work fine.
But the resonance of that open middle G is so crucial that tuning the
5th string down to a G as well may be better - so both middle G's
resonate and an accidental mute caused by the fretting finger is no
longer critical. You could also use GGDGGD but I believe from the
record that there are some B resonances, albeit quiet, so I would go
for GGDGGB; sounds better to me. And even without a top D, when you
play the D string octave harmonics, the G's will also resonate at a
D pitch too.

(But try your best not to catch open strings while fretting!)

The right hand technique is crucial to this song of course. Having
finally grown nails myself, I believe Nick used his (long, strong)
index fingernail, with his index finder and thumb pressed together as
if holding an invisible plectrum. I find if you angle the nail
slightly it makes the damped scraping noises work best. If you don't
have nails, I find that the side of a fat plectrum, held
stiffly and played close to the bridge is pretty convincing.

You might want to experiment, obviously. The track also uses lots
of reverb.

Intro (timing is a bit free):
key - H=12th fret harmonic, X=10, T=12
      the notes in brackets are played 2nd time around
notes - 
1. the 9X is a hammer, followed by  a slide to the T.
2. it's important to have your guitar in tune, because even though 
the D string is fretted in bar 1, the previous harmonic resonates 
with the bottom two strings and continues to sound!
Main riff and verse:
     -     -   -    -   - -            -     - - -    - - - - 
(The underlined notes on the D string should be stressed; the 
rest are picked quietly or damped)
notes - 

1. the unstressed X's and 9's in the first two bars are almost 
completely damped by the left hand as it moves from one 
position to the next, so don't try too hard to make them sound! 
2. the three stressed X's in bar three should get progressively 
louder, the last one ringing out despite the following quiet
brushes of the nail/plectrum. This is a bit tricky.     
3. playing the bottom two strings in the order suggested lets you
naturally damp the open D from the end of the previous bar.
Instrumental bit (after "growing old and I wanna go home" bit):
     -     -   -    -   - - - -        -   - -   -    -   - -
notes - 
1. V=15th fret, F=14th. Sorry about all the letters. 
2. The first V rings out a bit.
3. the X-T is a slide.
next instrumental bit:
|----------------|----------------|  and repeat 
   -  -  -  -  -
|----------------|----------------|  and repeat 
notes -
1. the playing is rather more even here, so although there is some 
emphasis, I've omitted the underlining in all but one bar as it's 
probably as confusing as it is useful. Just listen to the track... 
2. the 0's on the D string are caused by lifting the left 
hand as it moves down the neck. Obviously they're short and 
quiet notes.
3. you could play the low G on the other open G string (or both) 
but I find the left hand tends to interfere with it a bit.
Final two bars:
     -   - -   -    -   - -
Tabbed by Chris Healey