Wide angle lenses allow a bigger view but you can also use them to create the impression of greater distance and greater depth of field.
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.
Clean lenses by first blowing away dust or grit and then apply a soft cleaning cloth with a light pressure.
Adobe Photoshop Tutorials on the Web
A collection of Adobe PhotoShop Tutorials, Tips and Tricks.