Call me old fashion. Isn't reading mean't to be slow, what is the point of reading something and forgetting it
What not to do?
A casual reading through the books doesn't help much, because the concepts just pass by the mind without settling themselves in your memory. But the time that you have spent in such casual reading never comes back. Moreover a casual reading is boring.
http://fragrant.ideas.googlepages.com/2.html
Well, saying that I normally read maths books, which is just doing hundreds of problems. Now if you speed read a maths book I bet you won't get anything useful out of it, like being able to do maths or solve maths problems.

Also don't trust wikipedia when they say somebody can read books superfast or has a photographic memory, as it is proberly untrue.