Make sure your horizon is horizontal! There's nothing worse than looking at a breathtaking shot with a horizon tilting to one side. Tripods with built-in levels are very handy for crucial shots.
Get very close to details in your subject. For example architectural or structural detail. This subject isolation can sometimes be more informative than the whole, complete subject.
Always secure the camera by the strap or on a solid surface while in use. Always make sure it is stored safely.
