During the intro, I usually just play an open A.

Verse Riff:
G|-----------------|--------------------------------------------------|
D|-----------------|--------------------------------------------------|
A|-----------------|--------------------------------------------------|
E|---5p2-2-2-2-2---|--5p2-2--5p2-2--5p2-2--5p2-2---4-xxxx-4-4---------|
         x4

On the second verse, it's played normally for the first and third repeats, but the 
repeat is played on the A string instead as a variation, listen for it, and you'll catch it.

Chorus
G|-----------------------------------------------------------|
D|------------4-5------------3-4------------2-3--------------|
A|--5-5-5-5-5------4-4-4-4-4------3-3-3-3-3------0--2--0--2--|
E|-----------------------------------------------------------|
                              x2
G|--------------|----|
D|--------------|----|     Follow the guitar on this part.
A|--0--2--0--2--|----|
E|--------------|-0~-|
        x2

Overall, it's a very easy song. I can't figure out what to play for the intro/bridge, so 
suggestions are welcome.