The Spyderco Tri-Angle Sharpmaker is wonderfully easy and even comes with complete written instructions filled with color photos (18 illustrations on just steps #1 & 2 below) and a video to walk you though the process (though it really is not necessary).
The instructions cover sharpening:
-Plain edge blades (40 degrees)
-Back-bevel (30 degrees)
-Serrated edge blades (40 degrees)
-Flexible blades
-Electric knife blades
-Hatchet
-Hawkbill blade
-Other blade shapes
-Scissors
-Tin snips
-Thinning shears
-Pinking shears
-Straight razor
-Chisel
-Plane blade
-Wood gouge
-Wire cutters
-Paddle bit (spade bit)
-Router bit
-Screwdrivers
-Dental tools
-Fish hooks
-Darts
-Needles
-Potato peelers
-Nail clippers
-Cuticle Nippers
Here are the basic instructions for a plain edge blade:
Use the 40 degree (inclusive) holes.
1-Gray stick, on the Corner > |<, 20 strokes on each side (40 strokes total)
2-Gray stick, on the Flat < |>, 20 strokes on each side
3-White stick, on the Corner > |<, 20 strokes on each side
4-White stick, on the Flat < |>, 20 strokes on each side
Serrated edges are sharpened using step #3 only.
Consider getting the diamond sticks as well. They will help deal with blades that need reprofiling (are really REALLY dull).