You can only do that through knowledge of computers in general. There are quite a few hacker resources out there as well as white hat resources.
Hacking a PC in most nations is a felony so don't go at it with a cavilier attitude. It's not like the old days when the Feds only visited people who hacked banks and Gov institutions or did damage/theft to somebody. Even hacking another person's PC today can land you in prison despite doing no damage.
So your first step is to decide White hat or Black hat. The members of each comunity will not accept you unless you are one or the other not both. So are you going to be a hacker or a security specialist?
The tools are similer and many security specialists started as hackers. First step is to know your basic OS architecture and know the TCP/IP packet inside and out. Get to know the rest of the core OSI layers as well but the packet is still where it all eventually winds up at.
Switch to Linux. It's the OS of choice for both White hat and Black hat. It comes built in with a whole arsenal of hacking and network security tools. It also provides an ideal platform to analyze threats. If you are a hacker you'll want to keep a windoze box around or use a virtual machine to test efforts against.
Learn how to code. Forget .net it's a joke. Learn some real languages. Learn C++ in particuler. You will need it if nothing else to mod make files but almost certainly to write code. Learn Perl as well. Get a solid understanding of Web based technologies. Know the basics of server side scripting, Web services, XML, how web protocols like SSH, FTP, HTTP, HTTPS and such work. Study them and know them inside and out.
Get to know Nmap that is your first and primary tool for both trades. Then you want to get to know how to use vulnerability scanners. Learn the basics of comercial parameter security. White hat you might be in charge of it, black hat your going to have to beat it at times. Packet sniffers, Hex editors, a really good versitle text editor are some other essential tools.
Wireless is a major current trend that you need to know inside and out at this time for both White or Black hats.
Finally get to know some basics of human pschology. You will need it White or Black hat. Remember you are dealing with security and that always leads back to people. So you have to know a little bit about people to be good at either hacking or preventing hacking.