If you don't mind, I'd share my tmux config with you. I have mapped the control key to <ctrl> + <a> because I also got some boxes with GNU Screen flying around and I just can't remap my fingers… 

The pane movements are adapted from the standard VIM movements. 

setw -g window-status-current-attr underscore
setw -g mode-keys vi
set -g status-keys vi
set -g prefix C-a


set-window-option -g utf8 on
set-window-option -g mode-keys vi
set-option -g mouse-select-pane on
set-option -g status on

bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

bind C-d detach