As any parent, we've got a bazillion of pictures, but this tip might just help me take better ones rather than going back and erasing the blurry ones.
As often as possible pull your elbows in to your body and exhale completely before depressing the shutter. When you're working with a wide aperture or low shutter speed (or both), even a breath can introduce shake. Pulling your elbows tight to your body can really help keep you steady. I also press my elbows firmly into my chest for even greater stability.