The first chord played is D
Verse 1:
D
Sooooooooooooooooooooooo
                          Bm
Everything is average nowadays
                          D
Everything is average nowadays
                             Bm
Everyone would do it if they can
                                 G
And everything is going down the pan
                G/F#          A
And everyone is following the craze

And everything is average


Note: On the G/F# chord, just slide your first finger down to the F# note while keeping 

else in position for the G


      Invisible (Tab)
Halfway through the verse, there is a quiet little riff which goes like this:
e  |  ---------------------------------------------------------------------------  |  
B  |  -7---8-7-----7---8-7-------------------------------------------------------  |  
G  |  ---------7-----------7-----------------------------------------------------  |  
D  |  ---------------------------------------------------------------------------  |  
A  |  ---------------------------------------------------------------------------  |  
E  |  ---------------------------------------------------------------------------  |  

On the second verse, there is another guitar part which goes like this:
e  |  ---------------------------------------------------------------------------  |  
B  |  -7-----------------------7-------------------------------------------------  |  
G  |  ---(b9)-7---7--9b11----------(b9)7---7-(b9)--------------------------------------  |  
D  |  --------(b9)---------------------(b9)----(b9)------------------------------------  |  
A  |  ---------------------------------------------------------------------------  |  
E  |  ---------------------------------------------------------------------------  |  

Chorus:
G                      G/F#
Not much to believe in
A
Left up on a shelf
   G                           G/F#
So get your coats we're leaving
      A
We'll just do something else


      Invisible (Tab)
In the chorus, there is a synthesizer or something playing a riff which goes like this on guitar:

e  |  -7-5-2-0-2---------7-5-2-0-2-5---------------------------------------------  |  
B  |  -----------0---------------------------------------------------------------  |  
G  |  ---------------------------------------------------------------------------  |  
D  |  ---------------------------------------------------------------------------  |  
A  |  ---------------------------------------------------------------------------  |  
E  |  ---------------------------------------------------------------------------  |  

Verse 3:
Ohhhh Everything is average nowadays
Everything is average nowadays
And everything is of no consequence
Cos everyone is sitting on the fence
And everything will always stay the same
Cos everything is average

Verse 4:
Now you said you didn't mean it
You threw away the book of rules
You thought that we should read it
I wouldn't even know how to

Chorus:
Not much to believe in
Left up on the shelf
So get your coats we're leaving
We'll just do something else

Middle 8:
B               E
All I need is a ball and a wall
     A                    G     A          B
Or a sledge and a hill in heavy weather x2

At this point the chords go back to the verse, along with the first riff.

Chorus:
Not much to believe in
Left up on the shelf
So get your coats we're leaving
We'll just do something else


      Invisible (Tab)
In the background, the guitar playing the riff just before now plays this:

e  |  ------------------------------------------------------------------------------  |  
B  |  ------------------------------------------------------------------------------  |  
G  |  -4----2---------------------------2----4---2-------------------2----7----(b9)---  |  
D  |  ----------5----4----2----4----5-----------------5----4----2-------------------  |  
A  |  ------------------------------------------------------------------------------  |  
E  |  ------------------------------------------------------------------------------  |  

Verse 5:
E
Sooooooooooooooooooooooo
                          C#m
Everything is average nowadays
                          E
Everything is average nowadays
                             C#m
Everyone would do it if they can
                                 A
And everything is going down the pan
                              B
And everyone is following the craze
                              E
And everything is average nowadays