Summarize:

Serious Scrabble players memorize lists of high scoring words to improve their chances of winning.  Some common words include QAT, XU, OXO, JIAO, JEU, ZOA, ZEE, and AJI.  These words will allow you to score extremely well on future turns. Try to memorize some of the high scoring two letter words such as Jo, Qi, and Za. These words are easier to remember because they are so short, but they are also great score boosters. Although your opponent(s) may not be too pleased, you can add “S” to many words and get an easy points boost. This strategy works even better if the word is long, has a high points value, or if the “S” falls on a premium square. Watch for opportunities to add “S” to an opponent’s word as you play. Compound words are also great score boosters in Scrabble. For example, if an opponent plays BALL and you have the letters to play AIR, then you can play AIR in front of BALL and create the compound word AIRBALL. Playing compound words like this one will improve your score and increase your chances of winning the game. A bingo is a word that uses all 7 tiles in your rack simultaneously in one play.  In addition to the points that your play would normally score, you will get an extra 50 points added to your score. It is not always easy to find a bingo: look for 7 letter words in your rack that might fit on the board as well as 8+ letter plays that might play through existing tiles on the board.
Memorize high scoring words in Scrabble using tiles such as the J, Q, X, and Z. Use “S” to get points from your opponent’s best plays. Extend words when you can. Try to play a bingo.