Re: C-x C-o but in the other direction?

[Bernardo]

> If typically run emacs with 3 windows open.  I often find myself having to 
> do C-x C-o twice to get to the counter clockwise window.  Is there a 
> 'select previous window' command in emacs?
some people prefer windomove package; it uses shift + arrow keys to move 
between windows

see windmove.el or http://www.emacswiki.org/emacs-en/WindMove