Over the years I have frequently looked up "Howto" do something. Then recently I noticed a trend. Most of the "Howto's" I was viewing were on Howto Forge.
Howto Forge is mostly for Linux and variants of BSD. They break things down to the OS and then also to specific software, such as Apache, DNS, sendmail, and other common *nix applications/services. I highly recommend this site to anyone that is trying to do something for the first time. Also newbies should read over as much of this as possible to get a feel for how things are done.
The one area I wish they had is Howto's for Windows and Windows based applications such as Microsoft Exchange or Microsoft SQL Server. I know there are sites out on the internet that have the content I am looking for, but I would really like to build a Über-IT knowledge site.