Some friends of mine had become involved in poker and were doing quite well, and they'd been trying to convince me for some time to join them. After putting it off for awhile, I watched a couple of poker shows on TV just to see the basic Hold 'Em game play, then did a few practice games on the computer and played a couple of hands with a friend in a hotel room while on vacation.
The next week I played my first in-person tournament at a local casino. I had stellar luck and made it to the final table as the chip leader (directly taking out my friend along the way - minor guilt pangs there), but quickly lost it all and finished just out of the money.
I've been playing a few low-stakes ring games and tourneys online and still have a lot to learn, but my goal is to become a good player. From what I understand, mastery of the game is a lifelong, ever-evolving process.