You can improve your speed a great deal just by reading the introductory tips in most speed reading courses. Most of it comes down to observing how your eyes work mechanically and trying to make the input process more efficient. Probably the biggest detriment to speed is the regression. Whenever you stumble on a word or phrase and back up, you loose a tremendous amount of time relative to the overall process. If you can just minimize or eliminate regressions, you will notice a good improvement in speed--without any reduction in comprehension. It just takes a little discipline to develop the habit.