I've maintained my original loss for about 18 months now. I fluctuate within 5lbs of that mark.
I don't really log my food, but I do eat the same foods routinely, so that helps with my portion control. I have a fitbit and I exercise a lot. I think that's mostly the key - I workout at least 5 days a week, so I have a higher TDEE and can eat more. And I just try to be sensible. If I eat a big meal or at a calorie-heavy restaurant, the next day I make lighter choices. I try to find the balance.
I've been logging and tracking again in order to lose the rest and get to my final goal (except for this last week, because I've been sick). Once I'm there, I figure it'll pretty much be the same to maintain that loss.
The best advice I've ever heard: "Lift heavy things. Often."
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