Check your local junior high schools, they usually have a speed reading class that you can access.
I've always been a reader, a pocket book rarely makes it through an evening for me.
But in my early work years I was a janitor at a junior high and I met the teacher that taught that class. He tested me and I was really fast already but learned to be faster.
I have two speeds. If the book isn't really interesting me and I just want to get it over with I blast way past 2,000 words a minute cause I'm just getting the high points. I have really good comprehension even at that speed.
But if I'm really interested in a book I don't go quite as fast and read words rather than groups of words,(that's the secret to most speed reading)
But for me if you want to gain reading speed then put all other crap away and read. You have to use your entire mind to teach yourself to read/comprehend faster. Its mostly about you rather than something else. When I read,,,I GO THERE.
Give you an example. Today I finally got around to reading Seahawk Sailor's sciphy novella, it was great. Read it in about 10 minutes. Granted its short but I loved the set up and idea behind it, and am hungry for more. Read stuff you're interested in at first to gain speed and it will carry over.