There are many, many tricks you can do.
Some examples from my Tunnel Vision hold (and if you haven't played it, you should. I've put many dialogue tricks in there):
* Write in newspaper style. Make the first part important and the rest only an explanation of the first. This way, a player does not really need to hear except the first few sentences.
* Write shorter sentences. The game will wait shorter to display the next sentence if they are shorter. Besides, I don't want to read long texts.
* Make Beethro take longer to finish the room, don't let Beethro have a straight path from start to exit so that he can leave the room early. Also, let him do lots of interesting things there while listening. I don't like to walk entire boring spirals just to hear one sentence.
* Divide the room into multiple parts, and let the speech continue after Beethro reach that part.
* Don't move your character.
-- Tim
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