I'm a sucker for tutorials. Especially step by step painting ones or sculpting videos. Even when I'm not up for painting at the time, I find them really relaxing to watch or read through. I spend quite a bit of time scouring the information superhighway looking for ones I haven't read before. Here's the latest bundle I've found.
Some of these are in other languages but you can use the google translate option. If it doesn't have a dedicated "Tutorial" section but I've still included it on the list it means they still do WIP and guide posts. Flick through!