I recently did a blog entry on misused words and said that it's not all right to use alright. In a comment, someone asked when to use alright. Never. All right is correct.
I just found a nice blog entry on misused words for you to check out. This guy gives an extensive list, much longer than my own list. The writer also offers a nice movie quote about misused words:
"You keep using that word. I do not think it means what you think it means." - Inigo Montoya, The Princess Bride
More EDITOR@WORK blog entries
Entries from The Dog Blog
Blog entries from The Auto Racing Journal
(a book of great stories about the Intimidator)
(the book of great NASCAR stories)