If you write your book on computer, you might want to print out the daily portion every day, so that you can read the paper copy in your bed before sleeping, make notes in the margins, mark the typos and such, and dream about it ;-)
It's really not breaking the "don't read, don't edit" rule, because you are not going to make the changes in the draft. Not yet. That's for the editing part. You are not editing, you are keeping your mind focused in your story.
There are some studies that say people have a specific relation to paper copies, print. For example, people read print faster than they read screen. My husband says he can use his visual memory with paper copies, but not with computer pages.
You should also read out loud what you have written. The ears are remarkable writing tools :-D You will be able to hear if the flow and rhythm of what you have written is ok, but you are not able to see it.
The best 22 writing tips ever
#1 being WRITE!!!