This is the way this Good Riddance(time of your life) is heard on Nimrod
.It's very easy once you get the strumming pattern right.

Cords used for main part:
G12=320033
Cadd9=032033
D=000232


G12      Cadd9 D
1111|1111|1111|1111


the strumming pattern is
down,down,up,down, for every measure

Then the cords used for  the bridge are:
Em=022000
G=320001
C=32010

Em   G    C    D    Em   G    Em   D