Photoshop’s selection tools seem to evolve and change with every new update. Techniques and technology evolve to make selections a little easier than they were before. At least, that’s the theory, sometimes they just get more frustrating. But, there’s still no one technique that works for everything.
This video from Nathaniel Dodson at Tutvid is a long one. At 37 minutes, you’re not going to be finding any instant fix magic bullets. But, he goes through several different selection methods to explain how they all works, how to use them and what kind of images they work best on.