Coincidentally going with the English language mood, Lifehacker posted a link to Common Errors in English today. Ha!
For example, regarding the word OK:
This may be the most universal word in existence; it seems to have spread to
most of the world’s languages. Etymologists now generally agree that it began as
a humorous misspelling of “all correct": “oll korrect.” “OK” without periods is
the most common form in written American English now, though “okay” is not
Hey, I've always wondered what OK meant! Know I now (hahaha, only joking: Now I know).