In Emacs, C-x o takes me to the next window.
What keyboard macro takes me to the previous window in Emacs?
You might also want to try using windmove which lets you navigate to the window of your choice based on geometry. I have the following in my .emacs file to change windows using C-x arrow-key.
(global-set-key (kbd "C-x ") 'windmove-up)
(global-set-key (kbd "C-x ") 'windmove-down)
(global-set-key (kbd "C-x ") 'windmove-right)
(global-set-key (kbd "C-x ") 'windmove-left)