Reading through a new lightroom book, and found one of the handiest things EVER. Direct Adjustment (outlined to a small degree here). Don't like the hue/saturation/luminance of a particular color? just click and drag to adjust.
It works in the tone curve dialogue too! Want to brighten that dark grey wall? Just click and drag!
Anywho - pic of the day; a dog scrounging the ground around the restaurant dumpsters for scraps. No tags, but not aggressive so I just let him be: