The Work Sharp Precision Elite sharpening system is my favorite and easiest I've found for DIY sharpening. I put a seriously sharp edge on my EDC Leatherman with that thing and it's held up well. Key is to use long strokes across as much of the blade length as you can.
Discussion
That system looks really interesting. I looked at their other products and I think I'll go for their whetstone. It's something I've always wanted to learn how to do, and I've just got kitchen knives to sharpen.