I found Rob Riches (a fitness model) youtube video is very good and complete,
wanted to share with you guys^^
His youtube channel: http://www.youtube.com/user/RJRICHES
and website: http://robriches.ning.com/
must watch it all!!! very very useful information and I do learned more!
just watch this whole series of 8 videos, you'll get some idea to have better abs.Cheers!!!
1st vid:Basic knowledge about abs, how it works and how to start training.
so, you'll have better idea to get your 6 packs or 8 packs easier.
2nd vid: Lower abs exercise
3rd vid: Upper abs exercise
4th and 5th vid: Superset training on lower abs and oblique
6th vid: Oblique exercise
7th vid: twisting oblique exercise
8th vid: Finalizing pump and some extra tips^^