In our last game, we moved to having to use a card that wasn't part of your word (BEFORE rolling) to add its point value to the die roll. It's much better this way.
Furthermore, the next turn, you only replenish your hand up to the number of cards used to make the word (not replenishing cards used to add to the die roll). You don't get to replenish to 7 cards until you use every letter in your hand to spell a word.
This definitely upped the ante for us and made the game even more nervewrackingly fun.