One of my favourites so far.
The art of ninja as expounded upon by a master ninja. I mean, my brain says it's a joke, but it's so extensive and has books for sale.
The site is filled with gems, like this piece of advice on tailoring your training: "If I were in the Ring ... I'd have to regulate my diet and do a lot of running for stamina. When I'm a bouncer, I practice drinking and smoking."
Sound.