Ice cream - just make ice cream with it when it starts to get old.
I love my little table top maker
. Very convenient, not very loud and takes care of this issue easily. When you notice your cream is old, just stick the double walled bowl in the freezer overnight beforehand. I like to give it 24 hours of solid freezing.
I don't even use a recipe, just dump in enough milk products to make a little over a quart, add a cup of sugar, and maybe 2 tsp of really high quality vanilla, stir, stir, stir until the sugar is has lost granularity, throw it in the maker and wah, lah! I usually stick it out on the balcony to get rid of the noise all together.
30 minutes later - take it out of the maker, and either serve as soft-serve, or put it in another container and move it to the freezer for hardening.
2 small notes:
1 - the freezing process incorporates air so never make as much mix as it calls for - ie. mine makes 1 1/2 quarts, but I make just over 1 quart of mix.
2 - don't harden the ice cream in the double walled bowl. I ruined one that way.
Anywho... that's MY way of dealing with extra heavy cream in the fridge.