Well I'm going to upset you all... and tell you how I do it.
At 17years old I was a typical healthy reasonably exercise prone lad weighing around 67kg. 28 inch waist.
At 21 I was ditto around 70kg.
For the next 10 years I did little regular exercise but ate and drank normally and was then 72kg and very unfit. 32inch waist.

I then started regular jogging/running. 5 days a week Initially I struggled to do a mile then built up to 4. My weight fell to 70kg. I ate and drank as normal.
For the next 29 years I have run.. now every second day on average 3-5 miles . I have eaten what I like, I don't drink much alcohol (gin and occasional wine or whisky - very little lager) and now weigh 70kg. 31 inch waist.

I don't eat sweets or chocolate except as a treat every 1-2-4 weeks.
I eat biscuits when I like - about 4/day.
No sugar in tea or coffee. No sugar on cereals.. occasional condensed milk.
Semi skimmed milk only.
Very few puddings - one a week.
Cake only every 3-4 months.
Daily fruit : I love bananas and apples pears.
Breakfast, light lunch and evening meal.

Cream? In summer with fruit. And Christmas. And that's it. Full stop.. No creamy or milky drinks. Zillions of calories

Fast food? Once every 2-3 months.
Ice cream: summer only plus occasional weekends.

meat? Little fatty meat. Mainly chicken, bit of fish. Cold meat.

No real attempt to diet.

When I stop running due to injury I HAVE to cut eating or I gain about 3kg in 2 weeks around bottom and stomach. No biscuits. Reduce toast.

I also do daily exercises and yoga once a week. And garden in the summer. On non running days I walk 2 miles.

The key I believe is: regular exercise . I run or walk every day. EVERY day. As I run alternate days , I run Christmas Day, New Years Day, Boxing Day, in snow, in rain, in hail, in frost.. whatever the weather. Wherever I am. I've run in USA, Canada, Singapore South Africa, France etc. etc. When on business or holiday.

It's a routine like cleaning teeth.

It requires discipline and planning (shoes, clean running stuff etc).

If you are not organised and disciplined and are not motivated... however you try to lose weight... it will not work.

How you do it is irrelevant. Speed dieting is no good. You are talking lifestyle change. No food bingeing, no alcohol bingeing and regular exercise. Like REGULAR. No regular fatty foods or sweets or rich cream.

It's not easy at first. (Starting running again after 4 months off with injury at 60 is painful. PAINFUL.).

But it's doable. For anyone.

Most people who are fat lie to themselves. They do not WANT to lose weight. They are happy overeating and /or underexercising.

I could lose about 3kg if I tried. I will not cos I'm happy with my body as it is.

And to keep it a it is .. I will continue my exercise and routines until.. whenever I cannot... Another 30 years? I hope so.

As for lattes? oh dear!:-)))

Note : ready cooked meals from supermarkets are death for slimmers: we do not NOT eat them. Maybe once every six months.

Easy really. Discipline. And occasional treats. OCCASIONAL.

Edit
: If I stop running through injury and put on 3 kg, it takes about 4-6 weeks running and normal eating to lose it again.