One of my favorite sites is Grammar Girl. GG provides short, friendly tips to improve both your communication skills, both written and spoken.
Covering the grammar rules and word choice guidelines that can confound even the best writers, Grammar Girl makes complex grammar questions simple with memory tricks to help you recall and apply those troublesome grammar rules.
Whether English is your first language or second language, Grammar Girl’s punctuation, style, and business tips will make you a better and more successful writer. Mignon Fogarty, the creator and host of Grammar Girl, is an admins best friend.
Be sure to check out Grammar Girl's Top Ten Grammar Myths.
