Sony a (alpha) SLT-A55VL - Manual (Page 56)

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Shooting an image without camera shake
“Camera shake” refers to unwanted movement of the camera that occurs
after the shutter button has been pressed, resulting in a blurred image.
To reduce camera shake, follow the instructions below.
Stabilize your upper body and take a position that keeps the
camera from moving.
Point
1
One hand holds the grip of the camera, and the other hand supports the lens.
Point
2
Take a secure stance with your feet shoulder-width apart.
Correct posture
In LCD monitor mode In viewfinder mode