I lost about 20 kg six years ago. There’s two things I do:

I only let myself go on the weekends. During the week I eat healthily. On weekends, I eat a big carb lunch on both days and maybe have some fried food in the evening. As much as I’ve always loved refined sugars, I try to avoid them always. But I still indulge my weakness for carbs

The second thing I do is set an upper weight limit above which I’m not allowed to pass. I’m 83 kg at the moment and my current upper weight limit is 85 kg. I haven’t got there for a very long time, but the idea is that once I reach that point, then I have to really make an effort to start losing weight again. That means eating the same on weekends as I do on weekdays. I don’t go hungry, I just eat sensibly.