I have to agree with NA on avoiding the over-processed (eg: fake meat, reduced fat cheese, etc.) products. But that's my own personal health campaign, so I'm biased
I find that the "real" forms of things are more satisfying both in taste and fullness, so you can eat less of it and usually walk away happier. Plus some of that stuff only saves you 10-20 calories, which you can kill easily by overeating just a little bit.