A neat trick I discovered using the new Nikon D600 is that since I usually go on my shoots with a stager and/or the real estate agent who help set up each shot. I start with an initial shot in each room and together we look on the LCD screen for general framing and anything obvious like electrical cords showing or weird lighting issues. But because the screen is so small we almost always miss some details that aren't easily visible on the small LCD screen.
So here's my solution, since the D600 has 2 SD slots, I put my 16GB card in the primary slot and an Eye-Fi Pro card in the secondary. When I'm ready to take an initial shot I change the camera settings to save the RAW to primary card and JPG to the secondary card. The JPG is then automatically transferred via wi-fi within a few seconds to an iPad where we can all look closely at the image, zoom in and out and look for any issues we can fix on the spot. In our first shoot we caught a couple of issues which would have taken a lot more time to fix in Photoshop than to fix on location.
Pretty cool, I wish I had two SD slots on my 5DMKII!