I found the fastest way to develop the photofocus was to print out 12 magiceye type pictutes and look at them a couple of times a day. After about 3 days the focus became second nature.
For applying it to a book just stay relaxed and keep turning the pages. If the blip disappears just 'notice' the four edges of the book and keep going. You'll probably find that the blip comes right back. After a couple of books its stays more consistently.
Alex
