Difficult hair selections are all time consuming procedures to pull off convincingly. There are no real shortcuts and there are a variety of techniques to mask hair in
PS CS2-3. Depending on what the background is, the color of the hair and the style, all these factors will determine the workflow. Sometimes it takes 2-3 different techniques to get a good hair mask.
I know a guy who is a journeyman pre-press operator who has been given some nearly impossible hair jobs that had to go to press on high end magazine covers. Sometimes two artists work the same file, especially if it is one of the nearly impossible types, such as a dark/Afro hairstyle against a dark gray background. Very hard to get good separation. But the job has to be successful.
Fortunately the average hair masking job isn't going to press nor is it going to be that difficult to pull off. I had one masking job that was shot against a green screen and the knockout was fine, except the green screen bled into the blonde hair and then I had to deal with how to get the color right. There is always something which holds things up in a hair mask.
Learn to use the Extract Tool, Pen tool, channel masking, Apply Image, High Pass/Levels masking, Calculations, Channel Mixer.
And yes, Russell Brown's hair masking techniques are some of the best tutorials out there. I study them myself and apply them to my own workflow