Well I found that website pretty useless, way too much info and no obvious starting point.

I'd suggest you grab yourself a copy of "Assembly Language for Intel-Based Computers" (Author: Kip Irvine, Publisher: Prentice Hall, ISBN: 0-13-049146-2).

It comes with a CD and its everything you need to learn ASM. Teaches you how the hardware works first so you can start coding easily. Jumping into the code without appreciating the hardware makes it 10x harder to learn.

It covers a LOT of different techniques and has an excelltnt instruction set reference and comprehensive glossary and index.

I would have happily paid twice as much for this book. Go and buy it.