One of the techniques is to photoread your textbooks once a day for about 2 weeks when you first receive them. That way you use the classes for activation.
It certainly doesn't hurt and there are times when it's wiser to photoread than to activate the book especially if activation is difficult. Trust you instinct ask yourself 'should I photoread this book again?' if the answer is yes, then go for it, if no, it means you've probably reached the point of zero return for the effort.
Alex
