If you're reading this, then you probably know how to care for a cast iron skillet, but just in case: Never, ever us soap or any other kind of deterg...
Step 2: The Oil
So what oil should you use?
Flaxseed oil is a high omega-3 oil with a low smoke point. It'll polymerize into a tough, tough coating that when combined with the smoothed down surface of the skillet will be slippery as a Slip-n-Slide.