Eat less (fatty and sugary foods), avoid bread at all cost, and exercise. None of which people who want to lose weight seem to want to do.

So I'll add this in: practice better self-control or if emotional problems it's what's causing the weight gain and overeating, therapy.

Add to that: get a nutrionist or someone who took a few years of nutritional science who can help you manage your calorie intake. A lot of personal trainers are nutrionists too but you'll probably end up paying around $750 anyway so probably pointless if you're just doing it for the money.