A great article about 6 techniques to reduce the camera shake that leads to blurry pictures
Thanks Mike. Nice collection of Yoga style camera cradling techniques.
In summary - these techniques are most useful with telephoto lenses (zoom) where any slight movement is amplified.
Additionally: If you can afford it - get IS/VR on the lens, try higher ISO (on DSLRs adds less noise than you might expect), and lower shutter speeds.
One of the causes of camera-shake is the action of pressing the shutter-release button. So, if I am photographing a subject which is not moving I set the timer to 2 seconds, hold my breath and keep the camera as still as possible (using one of the methods mentioned in the article to which you linked).