Comment by Liblor

Resources I like that haven't been mentioned yet:

Offensive Computer Security (used to be a class at FSU): http://hackallthethings.com/ocs.php

https://www.cs.fsu.edu/~redwood/OffensiveComputerSecurity/le... (2014 version)

Opensecuritytraining (various stuff on different topics): http://opensecuritytraining.info/Welcome.html