On the chance that the WPs are not all covered specifically in the 101 Tips article, I reproduce them here:
1. Whenever possible you don’t hit the cue ball hard when you can accomplish the same objectives hitting it soft.
2. Whenever possible don’t apply English to the cue ball when you can accomplish the same thing hitting center ball.
3. Whenever possible you don’t move a second object ball that is already pocketable, after sinking the one you called.
4. Whenever possible you don’t choose cue ball routes that require your driving or forcing the cue ball, as opposed to rolling it, some place.
5. Whenever possible you don’t drive the cue ball to a rail when you can get it to an advantageous place without using a rail.
6. Whenever possible you don’t employ two-rail routes when one-rail routes will get the job done.
7. Whenever possible you don’t employ three-rail routes when two-rail routes (or, sometimes, one-rail) routes will do.
8. Whenever possible you provide yourself with a second shot that you can count on as part of all your mid-rack break shots.
9. Whenever possible we position ourselves to shoot balls on or near the rails early in our sequence.
Copyright George Fels-1977 and are not verbatim, I've left out George's comment about each one.