We've seen cooking pot techniques, but converting a cheap slow cooker into a sous vide cooking station might make the most sense of all. The whole project is under $US100, less if you own a cooker, and fairly easy.
The gear and how-to come through CHOW and author Jeff Potter, author of Cooking for Geeks, an excerpt of which we've previously featured. In a CHOW video, Potter shows the basic setup for cobbling together an extension cord, a thermostatic controller and your slow cooker. The result is a container that holds your food at whatever temperature you need, so you can pull off treats like sous vide steak without worrying about overdoing anything.
How to Hack Your Slow Cooker [CHOW]