For serious shooting, I am almost always tethered to my notebook computer. The ability to evaluate an image on a fifteen inch screen is ever so much more effective than trying to do so on the small LCD screen on the back of the camera. I use Nikon's Camera Control Pro 2, which includes a histogram and blinking highlight screen, and a full screen viewing window.
I tried the last two generations of Nikon's wireless tether systems, but abandoned them as they were far too slow to download RAW images; on the order of twenty seconds or so for a D3 RAW image.
I recently started shooting another series of images for the Phoenix Police Department. I completed the seventh in the series last night at the local airport, just off the active runways, with large, commercial jets thundering by all night. I expect there will at least seven to ten more sessions, and I will shoot tethered whenever possible.
Once I set up the camera and the herd of SB800s and their Pocket Wizards, and take a few test shots to set their power levels, I rarely take more than three dozen shots, in different poses with different officers. If we are after a single pose with a single officer, the total shot count may be less than a dozen.
HBB in Phoenix, Arizona Nikonian Team Member
Photography is a journey with no conceivable destination.