Pyrography stroke guide. Just happens to be the other half of something I've already Pinned quite some time ago but none the less imformative for all that. Also a very good link to a lady with loads of experiance ;)
DIY Wood Burning: How To Tips & Project Patterns - Plaid has this really cool craft tool ... called 2-n-1 Craft Tool! It's both a wood burning tool as well as a stencil burner all wrapped in one handy dandy package!