Here is a video showing you various methods for holding your camera to keep it steady. It's important to do this especially in low light conditions if you want sharp images. Video by SLR lounge
Here is another video showing a few techniques for how to hold your camera. Video by 52frames.
In this video you're show how to hold your camera in both portrait and landscape shooting orientations. Video by Manchester Street Photography.
Also check out this article on camera shake.
More photography resources.