I am not sure how many of you use Google Authorship. Imagine if your website is in the baseball niche and you are holding a baseball in your author picture how many more clicks you will get. This could work for most niches pretty well. If I were into knitting, I would be holding a chunk of yarn and maybe sewing needles really close to the camera in my picture (PS: I am not in the knitting niche This really does work well from my experience. Just make sure your face is in the image or they will pull your picture from the serps after a while.