In this tutorial I show you how to quickly create a "Bleach Bypass" look (or "Skip Bleach" as it is sometimes referred to) in the blender compositor.
I've tried to release my full series free, but mindbites wouldn't let me so there's a package there that you can get all of the videos for $0.99, feel free to upload them/share them wherever, you can link to the vids below:
In this shape modeling exercise we take a look at modeling a Twisted Doorknob.
You can download the blend file, reference image, and texture at http://tinyurl.com/2epmkfm .
The point of these videos is not to model a complete object but to rather focus on different shapes and issues that you may encounter while modeling. So, essentially, these are exercises.
Hopefully, these videos will help you better understand how to approach modeling certain shapes, and what tools are available in Blender to make things easier.