I am also starting a new job early in 2011 so I feel your angst sunerom.
My new role is something I have never done before and completely male dominated (one of the reasons I think they chose me...breaking the boys club) so I am feeling pretty overwhelmed.
I know I am capable both mentally and physically but the nerves are still there.
In my current role I have broken the boys club quite successfully for more than 6 years so I am using this knowledge to help me.
Best of luck though!