Somewhat perpendicular, but intermittent fasting has been a great recent lifehack for me. I skip breakfast every day, and sometimes skip lunch. Gives me back at least an hour every day. And gorging for dinner is a lot of fun.
For me, if I eat anything significant for breakfast (lets say > 400 calories), I am STARVING by the time lunch rolls around at noon. Like, stomach in pain, I need food now, I'll have 2 pounds of wings and a side of macaroni, thanks. But that overindulging doesn't carry over to dinner, which is pretty typical.
So, the synthesis of all of that is eating breakfast significantly increases my caloric intake for the day, despite having no measurable difference on energy, mood, etc.
If there are any rules that have worked for me, it's: Eat less, Eat less often, and Avoid carbs.
As an example, a diet high in fat is generally considered by most people to be unhealthy.
You see people doing Keto and you start wondering if it’s really unhealthy.
Eating red meat is considered to be the unhealthy. You see people doing ZeroCarb diets and they (at least) look extremely good/healthy.
Fasting is generally considered unhealthy. You have people doing intermittent fasting, ADF or extended fasting at it works exceptionally well for them.
Vegan? It works really well for some people.
IMHO there isn’t one thing that works for everyone as far as diet goes. There are also the theoretical and the practical aspects of what we eat and when we it it.
I think everyone should try different things and figure out something that works for them, long term. It should not be a “diet”. It should be just something that blends into your lifestyle and gives you results for the investment you’re making.