I presented my "Effective Sketches" talk last night at Skills Matter where we looked at how to produce effective diagrammatic representations of software systems and why they are useful. In other words, we looked at how to draw boxes and lines. :-)
Here are the links to the slides and video.
If you missed the talk, I'll be doing a slightly longer version at the upcoming Software Architect 2011 conference, which takes place in London during October.
Simon is an independent software development consultant specialising in software architecture and the author of Software Architecture for Developers. Simon lives in Jersey and regularly speaks to audiences around the world. You can find Simon on Twitter at @simonbrown and Google+.