Writing that should be read.

Websites:

Martin Fowler's Bliki
Fowler on software design, UML, development tools, and more.
Gentoo Linux Forums
A very helpful user base. A tome of knowledge.
Perl.com
All things perl. Interesting articles.
IBM DeveloperWorks
Big Blue grows a soul, or "Getting along well with others" for businesses.

Books:

More to come. Recommend something.