The song is very repetitive. I reccomend using a 1 millimeter pick for this song. You 
use your fingers but personally I perfer using a pick. Listen carefully for the changes.

The bass comes in at 0:04 with:
G|-----------------|
D|---7--7-7---7-5--|
A|-----------------|
E|-----------------|

Kep doing that until 0:22 and then it changes to:
G|-------------------------------7-7---|
D|---7--7-7---7-5----7--7-7---7--------|
A|-------------------------------------|
E|-------------------------------------|

Then play this until Ian sings "Yeah kick it!"
G|-------------------------------7-7---|
D|---7--7-7---7-5----7--7-7---7--------|
A|-------------------------------------|
E|-------------------------------------|

"Yeah kick it! Kick it!"
G|-------------------|
D|---7--7-7---7-5-5--|
A|-------------------|
E|-------------------|

"OW! UH!"
G|---------------------------------7-7---|
D|---7--7-7---7-5-5----7--7-7---7--------|
A|---------------------------------------|
E|---------------------------------------|

Play that until the third solo, then it goes back to:
G|-------------------------------7-7---|
D|---7--7-7---7-5----7--7-7---7--------|
A|-------------------------------------|
E|-------------------------------------|

After playing that twice it gets really quiet so you have to listen very carefully. It's 
repetitive right here:

PLAY 3 TIMES
G|-----------------|--------------7-7---|
D|---7--7-7---7-5--|--7--7-7---7--------|
A|-----------------|--------------------|
E|-----------------|--------------------|

Keep playing during the:I've decided to wear my thorn of crowns
I've decided to wear my thorn of crowns
Inside out
Back to front
Upside down
All the way round
Round, round rounnd

I've decided to wear my thorn of crowns
I've decided to wear my thorn of crowns
Upside down
Inside out
Back to front
All the way round

When it gets to the "downs" play this repeatibly:
G|---------------------------------7-7---|
D|---7--7-7---7-5-5----7--7-7---7--------|
A|---------------------------------------|
E|---------------------------------------|

Then after he finishes the "downs" it goes back to the fourth and final solo:
G|-------------------------------7-7---|
D|---7--7-7---7-5----7--7-7---7--------|
A|-------------------------------------|
E|-------------------------------------|

And you're done!