I recommend eating nothing but plain beans and rice for a year and drinking nothing but water by day and straight rum by evening.
No, but seriously. I always carry around a bit of extra weight. But I found that coming off of a really bland diet with almost no fat and no sugar, I appreciate all kinds of foods a lot more than I did before. I enjoy eating fresh veggies now, and I actually feel kind of yucky if I eat too much sugar. I have no regular desire at all anymore for diet sodas, so in the daytime I drink almost exclusively water. So that has helped since I've been back--I'm liking healthier foods a lot more than I did before (I even prefer my corn on the cob now without butter and salt.)
I've also been exercising semi-regularly since before I came back and even if I gain some weight, I still FEEL much better because underneath it I'm stronger. Some friends and I started doing pilates in camp for 15 minutes before showers, and at first I
hated it because I couldn't actually
do a sit-up without having my feet held down my something, when everyone else could. I felt like a beached whale and I was definitely not overweight at that point, just weak. But I stuck with it and after two weeks of every other day trying, I could. It's amazing how fast you can FEEL the results of a little working out before you can see them.
After coming home I started jogging and going to the gym. I started out jogging 8 minutes. Then 8 minutes without slowing to a walk. Then 10 minutes. Then 15 minutes. Then I started paying attention to mileage. I found that jogging is not for me, because although I can jog 2.5 miles now without feeling like dying, my knees hurt for days afterwards (I have two recently replaced ACLs). So I'm stuck with the gym. Having a gym partner (my wife) helps me stay motivated enough to go if I really do have the time but am just feeling lazy. And sometimes we don't do much--just 20 or 30 minutes of some type of least-heinous cardio--and sometimes we do, depends on how energetic we're feeling.
The main thing, though, is that I weigh myself with a good scale every day before breakfast. This helps me make decisions. I love food. And I love fattening food. I've eaten nothing but junk for the last week due to traveling and my wife's birthday, and I've gained 3-4 lbs because of it. But knowing that I've gained that weight is going to help me eat salads and small portions from now until Thanksgiving. If you don't know exactly how much you're gaining due to your indiscretions and losing due to your hard work, it's hard to stop putting off that next gym visit or that first day of I'm-going-to-stop-eating-cookies. When I weigh myself every day, I don't procrastinate as much about making changes that will keep me where I want to be. It's better to make informed decisions, I think, even if that decision is, "Why, yes, I think I WILL have another cookie . . ."