I also have this problem. But I do agree that there is not a right way to read a book. Come to think of it, there is not a right way to pack up to move, complete a project, etc. It's whatever you personally feel comfortable with at any given time.

I read this book about depression a few months ago and one of the chapters was about procrastination. The book suggested setting a timer for 5 minutes and to work on your project for that time. At the end of the 5 minutes, you can decide if you want to continue for another 5 minutes. Maybe you can apply this to your reading perhaps.