Square one

I've finally decided I'm going to do something about the shape I'm in (round).
I'm about 6'1" and 30 yrs old.
I've been a fat guy just about my whole life.  With one brief exception.  I had been around 280 since highschool, but in 2007 decided to make a change.  Started working out and doing Weight Watchers.  By 2009, I got down to 185.  I got to the point that I could run a half marathon, and do a few pullups.  Pretty decent shape and held it for about 2 years.
Now I've creeped back up to 242, couldn't do a pull up if my life depended on it.
I'm still fat guy at heart (I love eating too much bad food, and it doesn't take much to convince me to skip a workout), but I've been to the other side and prefer it.

Decided to make a change.  I've started contacting a crossfit gym and will try and journal the experience from square one.