How can i reset my Terminal? just some time ago i installed the OS X Server app on my mac and since this day it always appears server as the chosen directory in my terminal. 

But because i dont really like the Server application i just removed it but the server in my terminal is still left. 
So i wonder now how i can get the default back like users/...

I am running mountain lion on my mac.

I am a real newby to both mac and usage of terminal but i need it know for some work and i just get errors every time i am trying to enter something.
Goto your HomeFolder -> Library -> Preferences and delete the file : com.apple.terminal.plist

That should reset the settings on your Terminal