Removing Oil/Grease From Turkey Drippings Before Making Gravy?

After pan roasting a turkey, what’s your most effective way of removing the oil/grease that seems to accumulate in the drippings, before making gravy? I’ve tried all the various "gimmicks"..the oil separator which resembles a measuring cup with a"spout," using a slice of potato (though I believe that’s a "remedy for excessive salt removal), ice, [...]