I have a Canon rebel XS body and basically stick to two lenses: my 70-200 mm f/2.8 IS L and my 28-70 mm f/2.8 L lens. My problem is that when I focus and shoot, the image looks decent through the viewfinder and then on my little LCD screen, but then I take it back to my computer and its a bit blurry. I keep shutter speed at f/2.8. I would prefer not to use a tripod and I like to be a bit more mobile for event photography and usually add an angle to my images. Any tips on how to focus better while shooting without using a tripod?