This is far too important to let it pass.. For all of those who are just getting started using linux or have choosen a distro this is an excellent guide!

Ubuntu:
http://easyubuntu.freecontrib.org/overview.html  (Gets all of the vital stuff you need installed driver.. etc.)
http://ubuntuguide.org/wiki/Ubuntu_dapper  (Newest Version)
http://ubuntuguide.org/wiki/Ubuntu  (Older version 5.10)
http://www.wired.com/news/technology/software/0,71660-0.html?tw=rss.index  (Good FAQ before you try anything out..)

Fedora Core 5:
http://ubuntuguide.org/wiki/Fedora_fc5

Mandriva:
http://ubuntuguide.org/wiki/Mandriva

Making linux installs easier..
http://www.instalinux.com/
It creates a custom network install iso disk..

SuSE tips:
Online Repository (dont need the media to install programs): http://www.testmy.net/forum/t-17694