Let it cool, cover it with plastic wrap and poke a couple of holes in the plastic wrap and put it in the refrigerator. Putting the holes in the plastic wrap will keep the crusty part from becoming too soggy.
When you're ready to eat it, put it in the microwave to warm it.
Storing it in the refigerator with the holes in the plastic wrap is only a short term solution.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!