Word-Gamer has a recent blog post on 10 tips to win at Scrabble. These are tips that every Scrabble player should know.
#1 Look to play Bingos
Playing a seven-letter word will give you a quick 50 point bonus. Champion Scrabble players would rather exchange a bad draw of lettes than play a 5 or 6 point word. DON'T be afraid to exchange letters...especially at the beginning of the game when there are lots of open places to play a bingo.
#2 Play two directions with a hook
Add one letter to a word then go a different direction. This can quicly gain you additional points for an normaly run-of-the-mill word. Use the s, r, and d letters to your advantage here. Find a word that ends in e and many times you can add any of these letters and then play your own word in a different direction. Look especialy for higher point words that you can add onto.
#3-10 at blogspot article: