Compiz Shortcut Keys

SUPER+SHIFT+DRAG LEFT MOUSE = draw fire
SUPER+SHIFT+C = clear fire
CTRL+ALT+DRAG LEFT MOUSE = rotate cube
CTRL+ALT+LEFT ARROW = rotate cube
CTRL+ALT+DOWN ARROW = flat desktop
SHIFT+ALT+UP=initiate window picker
CTRL+ALT+DOWN=unfold cube
ALT+TAB=window switch
SUPER+TAB=flip switcher or ring switcher depending on which is enabled.
ALT+F7=initiate 'move windows'
SHIFT+F9=water effect
SHIFT+F10=slow animations
CTRL+ALT+D=show desktop
SUPER+K=show mouse

For Grouping and Tabbing:
SUPER+S=Select Single Window
SUPER+T=Tab Group
SUPER+Left=Change Left Tab
SUPER+Right=Change Right Tab
SUPER+G=Group Windows
SUPER+U=Ungroup Windows
SUPER+R=Remove Group Window
SUPER+C=Close Group
SUPER+X=Ignore Group
hold the super button then select the windows you want to group and then hit super+g