I've probably mentioned him here before, but Tim Pierce is a contemporary of mine from ABQ who came up through the local ranks at about the same time I did. We were casual friends, although he was closer friends (and even a roommate) of some of my other friends. (He did come over and jam with us at my parent's house one night when our band was rehearsing years ago. He was close friends with our singer at the time. Bobby Unser Jr. tagged along that night, too.)
30 years or so ago Tim moved to LA and started playing with several artists, most notably Lita Ford and Rick Springfield. Since then, he has become one of the most respected and prolific studio guitarists in LA, having played on something like 20,000 recordings. (Or was it 30K...I don't remember.) A while back he started doing a series of short videos showing him at work in his home studio. To me, it's fascinating to see how a real pro does it. This video shows him adding tracks to a couple of country songs...he does this stuff with virtually no rehearsal, and in just one or two takes.
Check out some of the other videos on his site if you're interested. Also, here's a list of some of the albums he's played on and artists he's worked with: