I know some of the best sites would be leading sites in the subject category matching the target site. I'm more interested in a handful of *specific* sites (i.e. yp.com), that are worthwhile regardless of category. This site is a local service business in a space without a lot of competition and the competition is also new businesses so I'm not anticipating it's going to take a whole lot of work.
Just wondering what currently are the "lowest hanging fruit?"