A Good Tutorial Series on producing videos professionally for selling products?

Hi guys

I was wondering if there are any video or PDF tutorial series out there (or available here) that explain how to create top quality sales videos in the likes of After Effects, and maybe something that suggests where the best places are to get backgrounds, sounds and such from, or a series that even provides some?

I'd really appreciate help with this one. I know a little bit about using After Effects and Director but I'd like to take it to the next level for producing sales videos.

Cheers.

Steve.

Thanks Chuykak, I'll give it a shot!

Does it go into where to find good backgrounds and sounds and such?