There are also some links inside individual tutorials to equivalent Photoshop tutorials for those who might want to note the difference in methods / approaches / commands.
Explains clearly and simply one of Photoshop's most useful and subtle tools:
Vibrance and Saturation sliders easily accomplish wonderful adjustments that would be nearly impossible with physical masks. Can transform a somewhat dull file into something more lively...
Books all do terrible jobs trying to describe what Adobe has done so clearly on this link.