I offer three I learned in the last 24 hours:
- F11, in Firefox, gives "full-screen mode." When you need the decoration, move your mouse up to the top of the screen and it reappears so you can use it. If you want to come out of full-screen mode, press F11 again.
- A new set of updates appeared for Compiz Fusion, which made me go look at the options (System -> Preferences -> Advanced Desktop Effects Setting). Turn on 3-D menus, then you spin the cube.
- Also, I like setting the cube to be transparent during rotation. ( set ... -> Desktop Cube -> Transparent Cube->Opacity During Rotation to 0)