[SkyMarshal]

1. Practice reading without subvocalizing the words in your head

2. Read sections, lines, or blocks of text at a time instead of word by word.

3. Use your hand/fingers/ruler/index card/etc as a guide to help focus on each line at a time, until you can do the above without them.

4. Read more, practice the above

Evelyn Wood Reading Dynamics books discuss these in more depth.