Check out the new Touch Tips available. Tip 010 deals with the Performance monitor and how to use it to optimize your synths. Tip 011 deals with Alpha Blending techniques in OpenGL.
The TouchPlayer/Mixer User Guide explains Mixer/Player shortcuts, recording and editing techniques, and customization. It explains the setup of MIDI devices for TouchMixer and TouchDesigner users.
A web page, TouchPlayer/Mixer Quick-Help has most of these techniques in a condensed HTML format.
TouchDesigner Reference Guide
The online TouchDesigner Reference Guide describes all the operators in TouchDesigner - Objects, Surface Operators (SOPs), Channel Operators (CHOPs) and Compostite Operators / Materials (COPs). Alternately you can click on the ? on any Operator parameter dialog in TouchDesigner. Download PDF version - Requires Acrobat 6.0+
TouchDesigner Scripting Guide
The Scripting Guide discusses the basics of using scripts, commands, and expressions in TouchDesigner. Also includes a reference section explaining all commands and functions available to the Touch user.
TouchDesigner Geometry Types Guide
The Geometry Types Guide explains the structure of the 3D surface data that a SOP (Surface Operation) creates, and the structure of the 3D geometry file (.tog) when it is written to disk.