I've recently upgraded to a Nikon D200 w/ an 18-200mm lens that took four weeks to arrive off backorder! So I'm running around taking "Happy Snaps" as my Aussie friends like to call them and just loving the quality of the camera.  Any tips/techniques I should be aware of with this particular camera beyond the traditional "learn what ISO is"? 

See some recent shots on my Flickr account.

What I really need to do is take another more advanced class.  Or maybe just follow Thomas Hawk around for a few days in San Francisco. ;)