Run it through a strainer, store it, and re-use it for frying. You will need to throw it out eventually, or I should say that I do that at least. I don't bother when using smaller amounts of oil, but when I'm filling the dutch oven for french fries, or fish & chips, those are pretty expensive fries if I don't re-use the oil. Even your favorite fast food restaurants probably only change their fryer oil once a week...and imagine how often it's used.