Since you may be interested in selling your work (emphasis on the YOUR part :) you could benefit from my vast photography wisdom. Haha! Well, not really. I'm a complete amateur but I'm getting better. It's all a process of trial and error.
If you missed my first post on photography you might want to start with the Photography Lighting Tutorial. Some parts of this work and some parts still need tweaking at least for me. You will need to discover what works best for you with the tools you have.