Time your reading speed. Set a timer for two minutes, for example, and read until the timer stops. Write down your time, what you were reading and how many pages you read in two minutes.
Quiet your inner reading voice. Read quickly enough to silence the voice that reads along with you. Read so quickly you cannot catch every word.
Read words in chunks. Break text into two-word chunks to start. Increase the size of the word chunks as your speed increases.
Use your fingertip to follow text. Follow the text as you read it to prevent re-reading content and to help keep your reading voice silent.
Practice reading daily. Double your reading speed with free speed-reading software you can find online.