Stacy's 10 winning words post has SCRABBLE on my brain. Further back into the archives, don't miss David's history of the game and a lunchtime quiz that yours truly (and wife Kara) wrote about six months ago.
To mix things up, I've occasionally played the game with one important rule change: allowing proper nouns to be played on the board. It adds an interesting (and often tricky) element to the game, perhaps because the distribution of letters are different in proper nouns compared to common nouns and other words.
While we're on that subject...
The names of what two U.S. states become "regular words" when you remove their final letter?
HERE is the answer.
FLORIDA > FLORID, and MAINE > MAIN
INDIANA > INDIAN also works, but "Indian" is a proper noun.