Well, I don't normally use any "technique" when I draw... I just do it! LoL I do know that one thing a manga artist should not be without is Copic Markers... These particular markers give your image a clean, smooth solid color! No streaky lines, like with other markers...(I can't afford Copic Markers ) So I don't know actual manga drawing techniques.. However...
Here's some books you might like! I hope you find what you are looking for!
1. Manga Mania by Christopher Hart --> This book offers short lesson on manga genres, and how to draw them. Most of it you might already know. There is a great section on panel layout and perspective. The art is average, if not down right crappy LoL but it's a good resource.
2. How To Draw Manga by Graphic-sha Publishing--> These are the ultimate guides to drawing manga and anime. There are over 33 titles in the series, and each deals with a specific topic and/or technique. The books go in-depth, to give to a complete and detailed run-down of how to draw manga. These I highly reccomend... However, they are a little pricy... But it's a good investment!
I don't have a website for this, but try Google! I'm sure you will find them!
Good luck, and happy drawing!