Points vs. Leave
Sometimes making the most points in SCRABBLE isn't as important as what you leave on your rack. Think about the letters you're leaving behind. Are they high point tiles that don't combine well together, or are you close to being able to make a bingo? Sometimes, playing fewer letters in SCRABBLE can help you get the tiles you need to make the big play. And at other times, playing a longer word with a lower score gives you the opportunity to refresh your rack, drawing tiles that could breathe life back into your game.
Always look for plays parallel to words already on the SCRABBLE board. You get points for every word you form, so while a word played alone may have a low score, the bonus from the words formed in conjunction with the parallel word can significantly increase your score.
Hooks are the one letter that will spell a new word when added either before or after a word already on the SCRABBLE board. For example, turn LUSH into BLUSH, HOST into GHOST, and COME into COMET and watch your points add up.
Head for the hot spots, better known as the bonus squares on the SCRABBLE board. One triple word score can make or break a game. And combining it with a high-point letter on a double letter score can multiply your points exponentially.
When to go back to the bag
Most casual SCRABBLE players don't ever exchange their tiles, but it can be to your benefit to refresh your rack. If you're consistently making low-scoring plays, you may consider exchanging your tiles. Make sure you look carefully at all the plays you could make before doing so. There might just be a hidden gem in a mix of letters that seem impossible. But a good rule to remember while playing SCRABBLE - leave as few high-point tiles in your rack as possible.