One trick that might help people is reducing/eliminating seed oils. Safflower, soybean, sunflower oil. They put that in everything nowadays, and it adds a lot of extra calories. Its amazing to pick up stuff in the grocery story and look at the ingredients to see where they randomly show up. Restaurants also use them a lot as a cooking oil, cheaper than butter much of the time.

They might also trigger inflammatory disorders but I'm less convinced of that. I eliminated them and lost tons of weight, though I had a pretty restrictive diet and was exercising a lot too so its hard to untangle the effects.