Here's a question from one of my readers:
I loved that you are answering photography questions on your blog! That is SO helpful. I have a question for you: when shooting portraits, do you use the "continuous" shooting mode on your camera, or do you always take single shots? I usually shoot in continuous mode and I'm still having trouble getting really tack sharp photos, and I'm wondering if that may be part of the problem. I shoot single shots cause I like to take 3 shots and re focus each one. I landed on this method cause I shoot RAW and I hated having 10 shots of the same thing taking up tons of space on each card. But, having said that I know plenty of Pro photographers that shoot continuous for the same reason you do...and it definitely works. You need to make sure you're focusing on the whites of the eye cause you'll want it sharp.
Hope this helps!