I don’t know who originally said it, but “Everything in moderation, including moderation.” That is, it’s okay to go overboard on something as long as that’s an exception, not a norm. Want to eat a whole carton of ice cream? It’s not going to kill you if you do it, as long as you don’t do it every weekend. Enjoy stuff, don’t be excessive generally, but the rare occasion is just fine.

Note: there are, of course, exceptions. You probably don’t want to try even a little black tar heroin unless you’re okay with the risk of becoming an addict.