Used to have a husband that sharpened them every day. For when he was away, he gave me one of those
pictured above but the mini version and not electric. It sure doesn't do the job he did. I still have one that he had just sharpened and because I have few occasions to use it, it is the only one that is still really sharp. I have the Trident sharpener steel and the whatever you call that after-sharpening honing steel, but I sure need some lessons. I've been thinking about getting some serious lessons as I do rely on sharp knives.
I get together with a group of friends who invite a mobile knife-sharpening service over (we get a group rate). We all take along our knives and sit around yacking while the fellow does the job in his truck. It's a great idea because the results, although sometimes more expensive than replacing the knife, are long-lasting and far superior to what I've been doing. When you calculate $5 per knife, and maybe 10 knives, that's an investment that needs to last.
(I also need a shoe polisher.)