Most important of all - practice, practice, practice...mix it up now and then. Learn lighting, composition, exposure and then change something in the mix every time you've got a camera in your hand.
Years ago, back in the film days, Tony Corbell told me to always save the last frame to do something completely different, regardless of what I was shooting. If you've ever taken a class with Tony then you know he's stayed true to that standard - he's always experimenting and looking for new ways to create the ultimate image.
Just remember, being an artist is a never-ending journey in education. You never stop learning and as Don Blair once said, when asked, "What's the best image you've ever created?" He answered, "I don't know I haven't taken it yet!" He was probably about 74 at the time!
Check out "Why?" one of the most popular features on the SCU Blog. It's a very simple concept - one image, one artist and one short sound bite. Each artist shares what makes the image one of their most favorite. We're over 100 artists featured since the project started. Click on the link above and you can scroll through all of the episodes to date.