well, it is very useful if u are learning PR at the beinging, although you can still do it when you are used to it, but when I PR a book, I just say positive affirmation(without closing the eye) and I start PR the book.

I am almost same as u, I PR the book, then I just read it through normally without using activation step. It is always easy to see, PR the book first before reading always makes it easlier to understand, sub-conscious process everything first. I only use the activation step if I have so much time to waste, during holiday or not University text book.