When I play this with my band, I wait til the second half of the first verse to start 
playing. But do whatever you want. :)

Verse:

G|---------------------|
D|------1-2-4-4--------|
A|--2-2---------1-2----|
E|---------------------|

Chorus:

G|---------------------|
D|---------------------|
A|--4(x4)-1(x4)--------|
E|---------------------|