We have a container next to the ice trays that holds loose cubes. It looks like this:We know, an embarrassing display of inefficiency, since we so often let that container sit empty. We don't need four ice trays; we just need to dump and refill two more often.
Even if you don't have a big, built-in holding tank, it makes a lot of sense to store a shallow container or bowl in your freezer where you can dump your ice tray(s). It makes getting ice cubes much, much easier—no prying out individual ones and then leaving a half-empty, waste-of-space tray in the freezer.
If the container is a narrow rectangle, you can even set one filled ice tray on top of the cubes you've already dumped. It won't take up much more space than having more than one tray, but you'll have much more ice.
Related: What's in Your Freezer?
(Images: Elizabeth Passarella)