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.
Avoid erasing images on the camera. Unless you KNOW the image is a dud, the small screen does not provide adequate detail to assess the image.
Never hesitate to take a photograph, the worst that can happen is a failed photograph but it also could prove to be very interesting too!
High Quality Lamination Services
7/16 Medite with taped or painted edge, bevel or flush, choice of colours