There's only so many ways to title Photoshop tutorials and make them sound interesting. Perhaps I hit a dry spell naming this one. Let's let the content speak for itself.
With that out of the way, let's jump right into how to use them successfully.
And now how to really take advantage of them by combining them with channels (It's less scary than it sounds.)
Feel like applying this knowledge? Find a picture with stray bits of hair you want to select, and follow me as I use masks to get perfect hair selection.