In this short video Kris Madden shows you how to read faster. The trick, he says, is to repeatedly say "AEIOU" or "one, two, three, four," as you read. This prevents you from vocalizing the written words with your larynx. Once you train yourself, you can stop uttering "AEIOU," and you will be able to read much faster than before, or so he says.
Scientific speed reading: how to read 300% faster in 20 minutes