Cornering (or, turning) tends to improve on its own over time. Although there is leaning involved, and, at slower speeds, you might benefit from weight shifting, about 99% of it is simple counter steering. Because counter steering is, well, counter-intuitive, for some of us (like me) it takes a bit of time before it comes naturally. It took me about a year (5-6K mi.) until I really improved. I generally found that time was more of a factor than thinking or studying it.
There is some value in practicing your entrance and exit lines (See Hough, etc.) and maintaining throttle all the way through the curve (Keith Code) (
http://www.amazon.com/Twist-Wrist-Basic ... 0965045021) to keep the suspension under tension. I practiced this a lot when I was on a long tour and it elevated my ability and reduced my "stress" when hitting extended gnarly sections.
I think the important thing is to be patient and not force the issue. Running off the road is the number two cause of MC fatality after getting hit by left turners. I think this happens because beginners try to keep up with experienced riders and panic when the bike goes wide.
If you like reading, Proficient Motorcycling is a nice quality book with lots of tips and illustrations and the Keith Code "twist" link I put above has some more advanced tips - aimed at racers but very applicable to touring the twisties as well.