Make sure the background you choose complements the subject of the photo. If you take a photo of a model against a busy background, the viewer's attention is going to be drawn to the background rather than the clothes. As a general rule, simple backgrounds with colors that contrast with those of the subject are ideal.
Don't be afraid to experiment! With digital cameras, you can now store an incredible amount of photos. Try it out! Don't be afraid to set up your camera at a stream one day and play around with the effects to see what kind of photos you get. It can be a great way to learn what works, and what doesn't.
In life, people are trained to always create things that are almost perfectly even. While symmetry and perfection are things people look for, try and take pictures of your subject off center. Beware of auto-focus features that lock in to whatever is in the center of the lens. Use manual focus instead, and lock your focus before snapping the picture.
Going to Sim City in Mong Kok to go look at some second hand camera equipment. But also to trade in camera gear and lenses to buy some new equipment!