BMI of 21 in my 50s, and it's not so much what I do as what I don't do. I don't deny myself any particular foods but I don't eat things like cake, biscuits, crisps etc every day, and I certainly don't gorge on them. These are occasional indulgences. Rarely nibble mindlessly in front of the TV, and am not a big drinker.
I don't tend to snack, and if I do it'll be an apple with nut butter and seeds rather than a bar of chocolate.
If I feel my weight going up I rein in whatever has caused it rather than let it continue, so haven't got into a binge-diet cycle. My BMI used to be 20 but I put on fat over the first lock down due to my living arrangements/more snacks and my activity levels dropping, though this is now stable.
I don't have an emotional attachment to food; I eat mainly home cooked meals (slowly) when I'm hungry and stop before I'm stuffed (even if that means leaving food on my plate). I love left overs so am happy to leave food as it's not wasted.
I don't calorie count but I'm aware of the nutrient value in what I eat, and aim for nutrient rich most of the time. I don't do low fat, but eat oily fish and avocados rather than chips and donuts, and am always mindful of the sugar I'm consuming.
Oh, and I eat sensible sized portions rather than pile the food on my plate (unless it's a massive salad which I love). I really dislike the Man V Food type attitude 🤮
My activity levels vary, but I regularly walk rather than drive, and I tend to fidget too, so even though I don't go to the gym I am quite active
A takeaway does two meals not one
Precisely! I order a curry and rice and eat it over 2 days
Those ready meals that say 'serves two' actually does serve two instead of saying ha ha and eating all of it
I had to point this out to an overweight friend of mine recently (in my defense he's asked me to help him lose weight and use tough love) when he was about to eat a meal for 2 by himself 🙄 He's fat because he eats when he's not hungry, and eats way too much. We're working on the reasons behind this.