Windows 8 70-687 exam

Hi

So I've been studying for three months now. Including cramming with study books. I'm totally nervous about my exam which is tomorrow..

I can't seem to get cmd prompts or powershell right though

I really really want to pass, a couple of the IT techs at my work haven't sat this exam which really makes me nervous. Can anyone help as to what things I really need to focus on?

thanks