I just wanted to point you towards a series of Silo video courses I have created for Digital Tutors. These range from character modeling, to vehicle construction and both high and low poly.
I have attached links below, so feel free to have a look and let me know what you think! Also, if there is anything you would like me to cover in the future please also let me know.
As always, more info can be found at my web site too
Hope you enjoy them, and feel free to share these links with your friends!