Great tips Mark the one about the lens cap flapping in the wind is the best. Others I would suggest are opening a car door and leaning on the roof for support, sitting on your butt with your knees pulled up to your chest and resting your elbows on your thighs. Think of composition and the rule of thirds (breaking the scene into two horizontal lines and two vertical lines and where they cross you show points of interest. Never pan unless you have to and use zooming (regarded as a special effect) to frame your shots. The three main shots in your videos should be wide shot, medium shot and close up, moving the viewer closer and closer to the action. Also, when shooting say a band or group performing in public, don't settle for shooting behind peoples heads, get in front of them as the audience want to see what is going on and feel involved.