This video explains how the Spyderco Tri-Angle Sharpmaker works, with tips to help you get the most out of this tool.
Here links to basic sharpening tutorials, courtesy of @RockNKnives
Beginner Knife Sharpening (Part 1)
https://www.youtube.com/watch?v=bAaP_QbS71A
Beginner Sharpening (Continued)
https://www.youtube.com/watch?v=sblh9owAbyI