Another little trick is to lean on something sturdy – the side of a building, a park bench, a wall, a car – anything that will keep you from causing your camera to shake. This can make the difference between a photo that is blurry and one that is sharp.
This next tip may seem like a no brainer, but think about it. When you’re holding your camera, where are your arms positioned? Are they at your sides or in the air? On a bright, sunny day, it doesn’t really make much difference at all where your arms are located. In low light, it is important that at least the arm that is supporting the camera is held tight to the side of your chest. If it is not supported, then the tiniest shake or movement can compromise the photograph.
Another tip that is especially useful in those critical, high stakes situations (such as weddings) is to switch your camera to make continuous shots (a.k.a. burst mode) and shoot away! By shooting in burst mode, shoot five or more shots of the same thing by holding the shutter button down. With pictures taken one after another, there is surely to be at least one photo out of the bunch that is sharp.
Finally, if the situation permits it, use a flash. The built-in flash will usually suffice for subjects that are between 6-12 feet away from the camera. Anything further than that will require an external flash unit to be used. This may be necessary if it is getting very dark or you need to capture something moving very quickly. If you can shoot it without a flash by adjusting the ISO and utilizing the other tips, then do so. Try to use the natural light whenever possible.