I've been using a Lansky, stone guide rod set-up, for the last few years. I sharpen hunting, fishing, kitchen, and pocket knifes with it. The clamp mount allows you to make accurate and repeatable sharpening strokes. I can get my Gerber hunting knife sharp enough to shave hair off my leg. (Usually not in the habit of leg shaving). A decent kit runs about 50 bucks or so.
Couple things I don't like about it. First, it's hard to keep a consistant angle around the curve to the point. Second, it takes a lot of diligence to make a sharp blade.
What do you use to sharpen your knifes.