A lot of people struggle with reading because they feel like they're not getting anything out of what they are reading. One helpful tip for better reading (not necessarily faster reading...but better) is to dialogue with the author. When you read a book, always have a pen in hand ready to mark it up.
"Why is marking up a book indispensable to reading? First, it keeps you awake. (And I don't mean merely conscious; I mean awake.) In the second place; reading, if it is active, is thinking, and thinking tends to express itself in words, spoken or written. The marked book is usually the thought-through book. Finally, writing helps you remember the thoughts you had, or the thoughts the author expressed." -Mortimer Adler