By Wook Kim
Updated October 18, 2008 at 08:00 PM EDT

Delivering exactly what it promises, Daily Writing Tips offers solid advice on everything from “10 Rules for Writing Numbers and Numerals” to “When and How to Use Brackets.” The site also has a message board (for registered users) and offers tests in spelling, vocabulary, and grammar. It’s a great resource to hone and improve your writing skills.