Motion techniques are especially helpful in reducing readers' habit of getting "stuck" reading the same words again and again. Another aspect of speed reading to keep in mind is "fixation." As your eye moves across the line, it moves not smoothly, but in regular intervals. After taking in a small group of words at a time, your eye skips forward to the next group. Each pause for a word group is called a "fixation." You can read more quickly if you learn to take in more words per fixation (expanding the "fixation zone"), and if you reduce the time for each fixation.
To expand your fixation zone, first hold the book a little farther away than you normally would. Then practice intentionally bouncing your eyes ahead and pausing less frequently to take in larger word groups. Both aspects of speed reading through changing the way you fixate on the words depend on practice, and intentionally challenging yourself to take in larger word groups as you read.