The things that help me -
1 Realistic Planning:
Meal plan and prep at weekends. Have some very fast reheats in the freezer. Do not be too ambitious. Build up a 2 week menu.
Do online shopping. less temping.
If you are meeting a friend for coffee and you aren’t planning on cake, take an apple so you can eat something while she eats hers.
For you personally write down your meal plan for the day, and how you plan to deal with tricky moments (eg cakes in the office)
2 Build basic routines and habits:
Eat 3 meals a day.
Eat protein and fibre in each meal, it’s filling.
Swap white stuff for whole meal.
Work up to 3 veg and 2 fruits a day.
Don’t random snack. If you need a mid afternoon snack as a regular thing then do, but don’t snack between meals and planned snack.
Generally avoid catnip food you can stop eating. Save it for special occasions.
Don’t eat in front of screens. It makes everyone eat too much.
3 Portion things
Familiarise yourself with what normal portions are. Put away leftovers straight away.
Eat off smaller salad type plates. Put your big dinner plates away for special occasions, they make everyone eat more.
Wait 20 mins if you think you’re hungry after a meal.
4 keep food out of your field of vision:
Don’t have treats in the house if anyone overeats them. Have them once or twice a week but outside the house. (that’s a lot of sugar in your kids lunch BTW)
Keep the salad and veg on the main fridge shelves, put the stuff you only want to eat in measured amounts in the salad draw.
Don’t have cereal on display.
If you overeat bread keep it in the freezer. If you overdo toast get rid of the toaster so you have to go the the faff off using the grill.
5 Move
Weightloss is almost all diet but all the stats say exercise helps you keep weight off. It also lifts your mood. So start small
bit build it in.
Other than that :
Change is in the small things and in being consistent. You will falter just keep at it.
be wary of fads. There is no magic bullet. UPF is clearly bad, but as you will see on this thread it’s also becoming the latest fad as low carb / clean eating / intermittent fasting / paleo / low fat have been before it. Ultimately weight loss is about not eating more than you need - of course eating the right stuff will better support you in that goal, but the main thing is not eating too much.
Use a calorie calculator to work out your deficit