What price should I charge taking pictures?

I am looking to take my photography up a notch by doing paid shoots. I am currently charging 150.00 Per session. 1-2 hours full edit and copyrights to cd. I figure with gas and, time and editing, it is a good start. Just curious to know what you think. If you are wondering what my pictures look like you are welcome to visit a page i started on facebook. facebook.com/caincaptures I appreciate any feedback on this. I do need to get this started pretty soon. Thank you for your time.