I like  this because it shows the simple structure behind the song.

I went to an excellent song writing course by Martin Sutton and he has put this site together as a social area for songwriters to share ideas and chat.  Click on the logo above to visit the site.

UPDATE: The site has now closed. Not enough people using it apparently.

If you want to know more about the courses that Martin runs you can find out on his site.

http://www.thesong.co.uk/