Mainly minimized carbs, added protein and a lot of extra exercise.

i already cut out most bread during the day, but extended it to skip carbs at dinner most of the days. Sometimes a few bites for the taste/texture.

Basically swapped most carbs for proteins. Cut out sugar and alcohol for a large part. Also new is 1 protein shake a day.

Gym from 3x/week to 4 or 5x. 10k steps a day on top of the gym. This is a lot for a sitting profession, most days I don't have enough time. Non-gym days I try to do either running or rowing, or a different non-gym sport.

I'm not overly strict on all this, (I'm a sucker for italian food) so there's plenty of room for breaking the rules, just not every day.

So basically:

breakfast: fruit with 0% yoghurt

between: protein shake

lunch: a few low-carb crackers with cheese/thin sliced roast beef/smoked chicken or whatever's left over from previous day's dinner

dinner: meat or fish with lots and lots of vegetables

It's close to keto, I guess.