How do I . . . . Cite a source? Get an "A"?
This site from The University of South Carolina Online Writing Centre is a great place to start when sitting down to work on an assignment.

The Purdue Online Writing Lab
This is truly and impressive site that covers the writing process from start to finish.

Ottawa University Hyper Grammar
An excellent, quick and easy grammar and writing site

Utah Valley State College OWL
This site offers great PDF documents on the content, mechanics and styles of academic writing.

Paradigm Writing Assistant
This site is an interactive guide for inexperienced and advanced writers

Capital Community College Foundation
A comprehensive Guide to Grammar and Writing.