I find it deeply disappointing that this totally skips some very important parts, namely attitude, motivation and ethics. (Except for so-called "Ethical Hacking". On the other hand, what should one expect from the blog of a security company?)
I recommend the all-time classic "How To Become A Hacker" by Eric S. Raymond:
I recommend the all-time classic "How To Become A Hacker" by Eric S. Raymond:
http://www.catb.org/esr/faqs/hacker-howto.html