1. Surf around the Web. Look at images at magazines, papers, on-line galleries and you'll find a wealth of ideas. Try the Gallery at shotaddict.com. Want more - go to flickr.com and look through tones of creative shots. Another useful source is VFXY, it displays recent posts from various photoblogs.
2. Learn the 'visual language'. Visit Art Museums, Galleries and Exhibitions that have photography shows. Learn art history from Antiquity to the Present and discover how highly creative people developed methods for expressing light and color.
3. Watch Movies. It is another source of inspiration, as they are nothing more than still images shown to you at 29.97 frames a second. Lots of ideas for concepts, lighting, messages, or just plain pretty images.
4. Frame your photo with thought. Think about the composition of your photo. Shooting the same thing from a different angle will produce an entirely different photograph.
5. Learn about art history. Visit art exhibitions featuring photography and discover how different people have portrayed the world. Reading about photography will put your work in context.
6. Learn about visual arts. Visit art galleries that have photography shows. Read about art history and learn how artists have developed different and exciting ways of depicting the world around us.
7. Shoot in different conditions. E.g. iff you shoot in early morning, late in the afternoon or in sunset, the available light will add more depth, create interesting shadows and color changes for your convenience. Try to photograph places in fog - it will hide distracting background elements.
8. Enter online contests. It's great inspiration to find interesting stuff to photograph. You have a topic, and it can make it easier to find interesting stuff to shoot. Try Contests at shotaddict.com.
9. Carry your camera with you everywhere you go. Often a great photo opportunity will present itself for only a moment. Take advantage of what life throws your way by being prepared.
10. Take a photo a day and see your life in a whole new way. Remember that a camera that you don't have with you is a camera that's not going to take any pictures. So try to have your camera on you as often as possible.