This nugget applies to all versions of Grabble and Crossdowns.

As the game nears its end, and if it's a close game, you should pay close attention to your opponent's last play.
If he/she should pass, and you're ahead by just a few points and you make a move, you give your opponent another
opportunity to make another word with more points and beat you. So, if your opponent passes and you're ahead,
it's to your advantage to pass yourself, end the game right there and get the win. I have learned this by experience!!