I remember a list back a few months ago. No fast travelling, sleep at night unless your a vampire, eat food 3 times a day, some say do not use the followers, unless they are quest related. that is just the basics then there was someone who said do not use the map while outside in the weather, the map could get damaged if you play the game with RL factored in. Don't travel in bad weather. Sometimes that is not possible I think. There might be more but that is just a few I try to go by the map one I break.

I like not fast traveling. Unfortunately though, the game is designed for you to fast travel, so a lot of the time it will give you stupidly tedious objectives (go from one end of the map to the other multiple times) assuming that you're going to fast travel. But it's still not really a bad idea if you enjoy traveling and fighting the random threats along the way.
I disagree with just about everything else you said, though (eating, sleeping, etc). That's not adding to the experience, that's just "grinding" activities that have literally no benefit whatsoever, not even virtual benefits to your character. Theonly difference between sleeping every in-game day, and just
pretending that your character sleeps every day, is that one robs you of your time. I don't think you're ever gonna say "I wish my character would have slept last night. The immersion has been broken!"