Writing advice:
Prezi: A Sample Philosophy Paper
Guidelines on Writing a Philosophy Paper
Guidelines on Reading Philosophy

My own advice:
Writing a Philosophical Paper (1) (PDF)
Writing a Philosophical Paper (2) (PDF)
(The second document is a useful exercise in learning how to read philosophy.)

Distinguish between valid and invalid arguments:
Self-diagnostic quiz #1
Self-diagnostic quiz #2
Thou Shalt Not Commit Logical Fallacies

Other resources:
How to Email a Professor, Instructor, or TA
Save Our Inboxes! Adopt the Email Charter!
Guidelines for Writing Philosophy