I love The Oatmeal. Great comics, great wit and excellent advice on grammar from artist Matthew Inman.
Combined with fantastic illustration, Matthew Inman does a better job than just the text explanations from my site.
|Apostrophes||How To Use An Apostrophe|
|Semi-colon||How to use a semicolon|
|Spelling||Ten Words You Need To Stop Misspelling|
|ie||When to use i.e. in a sentence|
You can order posters from The Oatmeal site, they are entertaining reminders that you should definitely put up in your writing room.