You'll really want to start with the hackers bible. Getting yourself a CCNA / CCIE would also be a good direction to go, along with expertise in HTML, PHP, Javascript and SQL

Once you're an expert in all of these areas, you can learn Perl to help you automate many of the attacks / probing vectors that you would have discovered along your journey to TechnoWizard

If that sounds hard, don't worry - You could always spend a bit of cash on automated hacking tools and become what is commonly known as a script-kiddy