By figuring out how I would eat to keep a healthy weight. Then I just started eating like this. Its slow, but you don’t run into the problem of being “done” with losing weight and picking up weight again. You just have a better eating habit and can stick with it basically forever - and as a bonus you can even have things like Pizza while losing weight.
Such a rule is basically un-enforceable. Because it is nearly never exactly the same text. So it is always the first time voted on.