The Pink Guide to Taking Philosophy Classes (MIT Department of Philosophy) (PDF)
Jim Pryor's Guidelines on Writing a Philosophy Paper.
The Economist's Style Guide.
William Strunk's mildly eccentric Elements of Style is also worth a look.
A useful glossary is in Pryor's Philosophical Terms and Methods.
Useful Philosophy Websites
The Stanford Encyclopedia of Philosophy (SEP) is excellent, albeit incomplete.
See the MIT philosophy page for colloquia dates, other philosophy subject information, etc.