I've finally learned to sharpen my own tools. Apparently you should spend a third of your time (okay, maybe that's an exaggeration to emphasize the importance) sharpening. Working with dull tools is both dangerous and ineffective.
I now own my own diamond stone, waterstones, Nagura stone, and burnisher to sharpen my knives, chisels, gouges, and scrapers.
The permanent marker trick is great to help you see what's being ground off the blade.