The basic method is:
1.
http://www.archive.org/web/web.php
2. Enter
www.castersrealm.com and hit "Take me back"
3. Select the archive that you want, such as March 3, 2000:
http://web.archive.org/web/200003040...tersrealm.com/
For class-specific web sites like eqdiva or monkly-business, it helps to know the original web site URL. In the case of shaman, it looks like Crucible moved from its original home to crucible.samanna.net in 2005, so you have to do some digging to figure out what the site was before the move.
Hope this helps.