Writing Sites

• Harvard University - The best online handouts on how to construct a paper, start to finsh. 
• Brown University - Different sections with online handouts and tools for writing for specific disciplines. 
• Purdue University- Short overview of helpful hints etc.  Also offers guides on writing for essay exams.  Great ESL site (location on 3rd dropdown menu).
• University of Richmond - Excellent site on how to construct a paper (subject specific) with great outlines from  how to improve grammar to how to document resources and use them effectively.

Style Guides

• Chicago Manual of Style
• MLA
• APA Style
• CSE Number System for Science Documentation

Grammar

• Grammar and Style Guide by Jack Lynch (UPenn) 
• Strunk and White's The Elements of Style

Writing Tips

• Signal Phrases (handout)
• Transitional Devices (handout)

Essay Exams 

• SUNY Geneseo - Excellent outlines with helpful first sentence tactics.  Very in-depth.
• College of St. Benedict & St. John's - Great alphabetical list of terms you could see in an essay question. What's the difference between enumerating and evaluating, criticizing and analyzing? 

Common Mistakes

• 20 Common Mistakes From Lunsford's Everyday Writer

• Oxford English Dictionary- Click on Enter OED Online.