Automatix

Now a great piece of software to help you install a bunch of stuff: Automatix

I started with an update (Automatix already installed) using Update Manager.

I then installed:

• Codecs and Plugins
• MPlayer Plugin for Firefox
• Ubuntu Restricted Extras and Multimedia Codecs
• W32-DVD Codecs
• Email Clients
• CheckGmail
• Miscellaneous
• Extra Fonts
• Nautilus Scripts (open as root option)
  
• Office
• Acrobat Reader
• Google Earth

Check for other useful software yourself :-)