Clean lenses by first blowing away dust or grit and then apply a soft cleaning cloth with a light pressure.
Make a backup copy of your images onto a separate drive or storage media from time to time. Especially backup images that are on your camera. A local photography shop can provide a "backup to CD" service when you are traveling or you can email important images to yourself.
Use motion to emphasize energy in subject. For example, pan with a moving subject to blur background.