Went to Best Buy today and saw a few cameras. DSLRs are huge and heavy. I held a Canon D5100 in one hand for less than a minute and my arm was already straining.
Camera straps/slings are your friends! I believe most DSLR kits come with a basic neck strap. My Canon T3i did anyway! They are not only good to protect your camera from being dropped, but they also put the brunt of the weight on your body instead of your arms.
You can even use them to help steady the camera a little by pushing the camera out so the strap is tight between the camera and your body. Works good if you are shooting video handheld and can only use the LCD screen.