A new year for me!

So, after getting soft for the past 4 years as a civilian, I decided that I need to whip my fat ass back into shape. I was never ripped, mind you; I am short, & stout (like a teapot?!?!). However, I was solid, at my peak. My recent snowshoeing trek showed me how unfit I really am; 5 hours of snowshoeing shouldnt have resulted in soreness for a few days. When I was active in the Army, it seemed I could walk indefinitely (and a few time, it seemed like I actually did). Although I am older now, and know I will not get back the fitness level of my younger days, I can still do what I can to get back into shape. I have put on about 20 lbs or so as a result of working a desk for the past 5 years, and this will adversely affect my health. I am aware of this, and am making the concious decision to control it. So, I joined my local gym today, and will start on a "getting back into shape" program on Monday.
I have never been a fan of the gym; however, I realize that I cannot do this alone; I have tried (I usually run for about a month, then find something else to do). So, I am hoping that by making this part of my daily regimen, much like it was when I was active (when we werent deployed somewhere), and this should help me keep on track. Time will tell; my goal is 30 lbs by June, or 2 waist sizes (which is more realistic). Time will tell!