Welcome, Nate.
I started at about 15 or 16, and I'm 37 now. And in my 5th day of quit.
I remember in college I tried to keep myself to a can a week. Over the past few years I thought a can a day was good. It doesn't stop.
Others may not agree, but for me the biggest thing is whether or not YOU actually want to quit. I've tried several times before, because I thought I should. But guess what--if you don't really want to quit, you'll cave at the first cravings. It has to be you.
This time, it's me. That doesn't mean it's pleasant. It really sucks, actually. But I'm convinced after day 5 that I'm going all the way, because days 1-3 were hell, and it's only going to get better.
Get some herbal shit, get some hard candy, get some gum, and most importantly get some titties to suck on. Welcome to January 2011!