Read a book you've already read. Or a short story. Then read the short story again, but faster. Another trick is to read extremely technical papers in a field

Read a book you've already read. Or a short story. Then read the short story again, but faster. Another trick is to read extremely technical papers in a field you're not familiar with. This can help you to stop subvocalizing as well as teach better syntactic cue'ing like chunking via prepositions etc.