There are several good tutorials on the web like: http://www.3dtotal.com/team/Tutorials_3/low_poly_character/low_poly_01.asp
There are also a lot of books. For blender i highly recommend this one: http://www.amazon.de/Introducing-Character-Animation-Blender-DVD-ROM/dp/0470102608
I´ve read about a few others, but i don´t know them personally, but if interested i could post the links here.
Greetings, Thracian

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All programmers are playwrights and all computers are lousy actors.