Hacking? Where to Begin?

Hello everyone, I have been reading and going to this site for a few months now and I finally joined. I always read great articles in the Grey Hat aspect of this site, and i have been inspired to dive deeper into the culture of hacking and programming. I want to know how to hack, but i do not know where to begin. I am a pretty decent programmer in HTML, and i am beginning to learn how to program in Python and Javascript. I am hoping that someone will be able to show me the basics of hacking, so one day i can do more advanced hacks and post my own How-To's on this site. Thank you people for inspiring me!