Switching To Windows

wmctrl -l                  # list
WID=$(wmctrl -l | grep Boing | head -n1 | cut -f1 -d\ ) # get Window ID matching Boing
wmctrl -i -a $WID          # switch to window with ID $WID
wmctrl -a Boing            # Find first window with Boing in title and switch to it     

Switching Desktops

wmctrl -d    # list desktops
wmctrl -s 3  # switch to desktop 3