Chimping, or checking the back of your camera's LCD screen after you make a photo has gotten a bad rap over the years. But I say if its there use it! Of course it should be used in moderation like anything else but there are times when checking that your exposure is in the ball park can save you lots of trouble afterwards like it did here a few days ago while I was shooting a wedding over on Ishigaki island.
I was shooting away doing my thing as the Bride and Groom were entering the chapel when I took a quick glance down at my LCD screen for a quick check that everything was in order, only to notice my last few shots were horribly underexposed!
So I checked my settings to see what was wrong. ISO 400 fine, shutter speed 160/sec no problem there. Aperture f0.0??? whaaa?? It turns out the connectors between the Nikon D3 body and the 24-105mm f2.8 were not talking properly and thus the aperture in the Nikon lens was stuck in its fully stopped down position at f22 ahhhggg! Luckily I quickly noticed in time and gave the lens a quick wiggle to try and get it to connect properly again with the camera just in time to make the shots I needed from that scene.
Happy confident shooting! 8)