I remember the first time I dragged knee. It was in June of this year. I've only been riding about 7 months so I guess I picked up rather quickly. I also just got done healing up from a broken left wrist that's been casted for 2 months since April of this year.
Anyway, I went out for ride with a couple buddies to Palomar South Grade Road. I'm sure you So-Cal residents know much about it. I just got my brand new suit. Barely a week old and not even broken in. Palomar is regarded as the most technical road in So-Cal and it has a ridiculous amount of hairpins and decreasing radius turns in about 7 miles. SO you'd probably have your bike cranked over to the side if you're going at a decent pace.
But anyway, I remember taking the first left hander going up hill, which is a tight decreasing radius turn. Now I'm going a fairly decent pace here. My tires were not up to temps even after a 40 mile ride to the mountain. I set up for the turn, going about 50MPH, I slow down to about 35-40MPH hang off, and stick the knee out, definately not expecting for the knee to touch down. I take about half the turn knee inches from the ground, but when I reach the decreasing radius point, I roll off the throttle to make the turn. All the sudden, I hear loud stange noise. I also feel my bike taking a tighter line than I intended. I'm like "WTF? I'm dragging a knee!!" Let me tell you, brand new pucks on pavement is a shitty feeling. The sliders actually drive in to the pavement slowing you down slightly. But ones that have been used are much, much smoother. I guess the moment I dragged my knee, I also fully chopped the throttle, so my bike was wobbling and it basically scared the shit out of me.
All day that day, I was basically dragging knee, excercising my new found riding ability. It's really surprising and scary at first though, and no amount of mental preparation will get you ready for the very first time you touch a knee down to the pavement.
I actually drag less knee now while going as fast or faster than I did back then since my body position has since improved. I don't ride crossed up anymore, half my ass is off the seat, my head is kissing the mirror, and I keep my head and body low. I'm only 5'7", so It's hard for me to drag knee compared to you taller guys. I really have to get my bike cranked over to get that knee down. And with the amount of ground clearance on the new Superbikes, it's surprisingly hard to drag a knee. SO keep that in mind.
Just work on proper body positioning before you go out and start dragging knee everywhere. Remember, you want to get through a corner as fast as possible with the least amount of lean.