I freehand sharpen using a coarse diamond stone, then a fine one, then I use 400 grit sandpaper, then 800, then 1500, then 2200, and then I strop with cardboard. This produces a mirror polished, crazy sharp convex edge. It takes a while to get your technique down, but freehand sharpening is the best. If you want a toothy edge, just use a diamond stone and give it a couple swipes with a chef's steel.