I've together a video of how I make the Nosferatu's collar from my book, Creepy Cute Crochet.

The "sl st in the front two loops" bit is what most folks find tricky, so, I also have a drawn- out diagram available here:
http://needlenoodles.com/pics/tutorial/front_loops.png

(the diagram shows working in the front two loops of a tr instead of a dc, but it works essentially the same way)

If you need a quick refresher on basic crochet stitches, I like

http://learntocrochet.lionbrand.com/

Of course, a good old YouTube search will usually prove useful as well :)

Happy crafting!