Hello Plutom,

there are some nice tutorials and hints about that topic over at the DAZ Hexagon board.
The Carrara modeler is more or less a small version of the Hexagon tools, so many of
the Hexagon tutorials can be applied to Carrara too.

These are just a few:

http://forum.daz3d.com/viewtopic.php?t=38424&highlight=
http://forum.daz3d.com/viewtopic.php?t=90943
http://forum.daz3d.com/viewtopic.php?t=101535