You might want to start with the Cowabunga System. It was developed by our very own Pip Surfer as an example of how to create your own system; he's even dedicated a weekly blog for it. The blog has been available for some time now but if, for some very strange reason, you haven't heard of it, you might want to read the FAQ on it.
Finally, have a look at our Forums, which has also covered the Cowabunga System since 2007. It's full of experienced traders ready to share their experiences with you and help point you in the right direction.
We hope this helps in the formulation of your very own system! Good luck!