Yeah, you skinny bastard!! How did you manage to git-r-done? I mean, you're married, so it's not like you get much PLEASURABLE aerobic exercise! 
I'm a goals and objectives kind of guy. Set a goal then define a series of objectives to help reach it. For several years the doctors have told me to ignore the hight and weight charts, that I should get down to 220# and then come in for an evaluation of where I should be.
Last Thanksgiving I was at 296#, set the goal to be at 220# by January 1, 2010, and an intermediate goal of 250# by the Pro-Am June 13th. I laid out a plan of 1. Eating less at each meal; 2. Cutting out the crap and junk; 3. Eliminate snacks between meals and especially within a couple hours of going to bed; 4. Get more exercise; and 5. Drink more water (I have a uric acid problem (gout) that causes kidiney stones and real bad joint pain) - a nurse once told me, while they were fishing out a stone (don't ask how but the basics are similar to forcing a fire hose through a cocktail straw

), that if there is any color in your urine you aren't drinking enough, and I found that that rule controls almost all my pain.
The changes in the eating habits haven't been too hard as long as I don't skip meals, and stay away from the funeral cake. With my uncertain hours it is common for me to miss all three meals in a day, and then all I do is eat crap all evening. The exercise hasn't been too bad since we had a couple of clothes racks (aka exercise bike and nordic trak) taking up space in the family room, and now for the last month the weather has gotten nice enough to bring out the lawn mower.
I don't track what I eat, but I do record my weight each week, I record my exercise, and I make notes of anything that might make a difference one way or the other ... Like the muscle spasms that laid me up for three weeks with minimal movement.
Oh ... As of yesterday morning (I weigh on Sunday mornings first thing) I was at 247#, and I'm starting to have issues with clothes

Good Luck! It can be done!