General Philosophical Links
Episteme Links: The best source for general philosophical links
The American Philosophical Association
Advice on writing philosophy
Cummins and Rosenberg is useful for beginners.
Information on Graduate Schools in Philosophy
Brian Leiter's Philosophical Gourmet Report is an influential (and controversial) ranking of graduate programs in philosophy. Includes advice about applying to graduate school in philosophy.
And last but not least:
Philosophical Humor (courtesy of The University of Mississippi Philosophy Department)