Here you can find some usefull links if you are a fellow drawer or 3d artist !
If you are looking for a good laught, here is my official retired 3D portfolio (seriously outdated): http://3drips.wix.com/portfolio
Websites with good material references. Some have a random gallery browsing with a timer, so you can sketch like in art class :
Help for lighting :
Turnable models for 3D ref :