Do you want your skies bluer, faces less red, or other colors in your photo more or less intense or lighter or darker? In Lightroom this sometimes requires painting with the adjustment brush, but it often can be accomplished much more quickly with Lightroom’s HSL/Color panel.
In this video tutorial from my Lightroom 4: The Fundamentals & Beyond series (10 1/2 hours of training on 55 videos), I show how to use the HSL/Color panel in Develop to get dramatic results quickly. (UPDATE: This tutorial also applies to earlier and later versions of Lightroom! Check out all versions of my Lightroom Fundamentals & Beyond training here.
As usual, for higher quality, once you hit Play, click on the sprocket wheel in the bottom right and choose 720/HD.