You can try to look over it several times and you will be reading fast but as you go back you will be getting into the book more and more as you understand it.
If you don't want that the best thing that you can do is to read at your own speed, because if you want to get a book, you have to make sure that you are doing it your own way.
Sometimes it could be the place that you are is not make you concentrate as much, so maybe you can try to go to a more quite place, you can try to put away cellphones, grab your i-pod if you need to, and turn off computer and the t.v. and stuff and concentrate only on reading?
For me it has just been practice. In reading and langue skills I was always behind my grade, but in 4th grade I started picking up fantasy books and reading them. At first it was slow and painful - wasn't until 7th grade that I caught up to the rest of my class in reading and langue skills :P. But now I'm almost addicted to reading and go through ~800pg fantasy books on a weekly basis, just reading them in my spare time (15min breaks & lunch breaks at work, waiting in line, and a bit before I go to sleep each night).
The only way to learn reading faster is practice, practice, practice.
Some people have a talent for it, and they can read extremely fast. First-grade-Schoolkids read letter-by-letter. More proficient readers read word-by-word. But some people can read an entire line or even an entire page at once.
You have to be in a place where you're not going to be distracted by music, TV, people, etc.. if there are lots of things or worries or mind you wont be able to. You have to be completely focused on and inerested in what you're reading..
Well it really depends on the person. I am a skim reading and read really fast and can comprehend everything but just looking over a sentence or paragraph. Not everyone can do this but i suppose iwth practice you could
i would definitely say skim through the book or text and read only the sentences that are important. Look at more of the verbs than the adjectives (though some adjectives may be important).
i am 13 and read college level, according to tests. i usually skim read if im in a hurry, or read it completely if not. either way, i'm still pretty fast
i can read quite fast. but most the time i read it the second time and i just scan what i read picking out the most important bits.
the more u read the faster u get