Try not to sub-vocalize words you see in print. When you were little, you had to sound out words in your head, and that's how you started reading. Unfortunately, people tend to only read as fast as they can talk.
Avoid moving your eyes as you read. Training your peripheral vision is key to getting faster.
Perform exercises to strengthen your peripheral vision. Start with a narrow reading material, like a newspaper column. Such materials are easiest to read without moving your eyes. Look at the middle of the page or column and try to read a letter at the center of the first line. Then, without moving your eyes, read the letter to the left of that. Then focus on the letter to the right of the middle letter. So basically your mental focus is going back and forth and getting further from the middle every time. When you are finished, move to the next line. Keep repeating the exercise until you are done with the column.
Practice these techniques for a week. Then do the same thing but with words rather than letters. This will help you get better at recognizing whole worlds. Stop reading smaller words like "the," "and" and "to." Words like this slow you down, and you can usually get the meaning without them.
Point your finger on a line, scan all the words but don't sub-vocalize them. Try to get the main idea, then slowly slide your finger down to the next line. If you keep doing this you will get better at absorbing the data.
Keep practicing speed reading techniques.