I have one of those sharpeners that you run your rotary cutter through like a knife sharpener, I guess you'd say. It works for a few times and gets you a lot farther than you'd get w/o it. But I recently found the Titanium blades and they really are longer lasting. You eventually have to sharpen/replace them but it takes a LOT longer to dull them. Then I usually just keep them in the plastic case they came in. I guess I haven't gotten to the point that I had one full yet and had to decide what to do w/it from there. Someday soon I will, I'm sure.