Tutorial: Seamless grunge textures with Photoshop

An excellent example of why I'm happy I did this experiment - here is a tutorial from Jesse J. Anderson on how to make seamless grunge textures using Photoshop.

What I appreciate the most about Jesse's tutorial is the step-by-step detail that is given. A lot of tutorials, that I've come across for similar things, are a mess of screenshots with captions as instructions. I like this balance better.

Source: Texture Tutorial 01 - Seamless Grunge Textures.