I've always read very fast and don't know any convenient way to describe to you how I do it. Sorry about that.

However, I had to be taught to read aloud fast, for competitive speaking purposes. I'm told by other people that did the same exercises that I did that their silent reading speed increased, as we were constantly pushing our speaking rates up and you have to read faster than you talk or bam problems. (Competitors in collegiate forensics often speak more than several hundred words per minute.)

The easiest way to acquire the ability to speak fast is to drill, drill, drill -- pick a newspaper and start talking, then go faster. The thing to keep in mind is that your eyes have to arrive at the word faster than your lips do. As you do that, you'll discover shortcuts which "work for you" (largely subconscious for me -- I know, because I've made mistakes in ambiguous sentences, that I must not actually be reading everything my brain processes as being there).

(Sidenote: if for some reason you need to be able to speak faster or with more confidence, I recommend shadowing a newscaster: just repeat what they say, as they say it. This is an exercise they teach simultaneous interpreters and it is much harder than you think it would be.)