One of the real skills in Scrabble is spotting the 7 letter word from an unlikely looking rack of letters. It's difficult to do this when you are shuffling all 7 letters so try to see whether you have any common suffixes or prefixes. If you have UN, IN, RE etc. move these the left of the rack and then shuffle the remaining five letters. Likewise, if you have -S, -ED, -ER, or -ING move these to the right and play with the other tiles. You'll find it easier to find possible 7 letter words this way.

Some other good prefixes are OUT, OVER, FORE, UNDER. Other useful suffixes include -AGE, -EST, -FUL, -IEST, -URE, -ABLE.