I collect yardage books as well. I love opening them up while laying on my couch at night and going through them page by page and remembering the holes. They serve as great memory aids. And great mementos with wonderul memories!
As far as using them on the course, I really like to get a good sense of the yardage I am at by using landmark recognition and the yardage book, then consulting my GPS (Skycaddie for me), then shooting my laser range finder, and finally stepping my distance off using the sprinkler head yardage markers. I find that taking these four yardage measurements and then using a proprietary formula I dervied which takes into account not only the average distance into account, but also the median and mode distances. If I then geo-metrically link them prior to getting the mean of those numbers...that is when I feel most comfortable about my distance and then I am ready to begin my pre-shot routine...which of course is modeled after JB Holmes' routine.
Maybe it takes me a little longer than most to play full 18 (8 hours or so), but I feel real confident on my club selections and it seems to be working wonders...I've dropped my handicap from 34 to 33 last year. Not too shabby!!
FYI...part of this post is true...can you guess which part?