I use a portion of my freezer space for ice cubes. I make a batch of ice in the ice machine, and then freeze it until it gets low and/or used. My fridge doesn't have an ice machine and this uses less freezer space than ice cube trays.
I use the ice to make delicious alcoholic drinks, and would happily make more ice than I ever though I'd need just to avoid having to make it when inconvenient.