Being able to live without mobile phone for longer than 15 minutes is a useful skill to have if You want to survive !
I've lived for over 5 decades without a mobile phone.
Ability to use a map to navigate without your phone literally telling you where to go
Not a problem, as long as the map is accurate. I looked up my own address on Google Maps a couple of days ago and it's two years out of date.
Being able to converse in silence for hours about philosophy with zero alcohol or drugs involved - that's a skill to cultivate while 1970s and 1980s had house parties which had this often
All you need for this is a cat.
Every major city in the northern hemisphere is the target of one or more nukes; even now. Better grab every 3e and 3.5 manual in print and a lot of dice....
There's nothing wrong in being a bit of a prepper and stocking up two-three weeks of canned food in advance; from earthquakes to power outages to maybe surviving the nukes. But good luck with that last one.
Well, I don't play any edition of AD&D higher than 2nd ed. But I've got lots of modules, manuals, dice, pencils, and graph paper. Between those and regular D&D, plus 60 or so Fighting Fantasy gamebooks (plus manuals on how to create new adventures), I'm set.
As for canned/nonperishable food, Maddy and I are set for at least the next 3 months. I have a few more things to stock up on for the winter, because once we get the snow that stays, I try not to go outside unless I absolutely have to, for appointments or essential shopping.
Speaking of canned food, I once had a friend who did not know how to operate a manual can opener. For some reason the electric one wasn't working, and she was in a panic over how to open the can of stew we planned to have for supper. I asked if she had a manual can opener and she found one, but had no idea how to use it. So I taught her (this was in the '80s).
According to Robert A. Heinlein, this is a list of what everyone should know (or at least men; the character making this speech was Lazarus Long, in
Time Enough For Love):
A man should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently and die gallantly. Specialization is for insects.
From that list of skills, I can change a diaper, plan an invasion, design a building, write a sonnet, balance accounts, build a wall (honesty compels me to specify that the wall must either be in a computer game or made of LEGO), comfort the dying, take orders, give orders, cooperate, act alone, analyze a new problem, cook a tasty meal (as long as the diner who eats it likes grilled cheese sandwiches), and fight efficiently (as long as the enemy is either part of a Civ game or a RL mosquito). I wouldn't know about dying gallantly, since I'm not dead yet.
One skill that's useful and not on Heinlein's list is sewing. I used to know how to thread an electric sewing machine, but it's been over 25 years since the last time I had to do it (my grandmother would ask me to do it because her eyes weren't quite good enough to thread needles anymore), and I've forgotten some of the steps. But I prefer to do my sewing by hand, since it's less dangerous. The problem now is that with my close vision still wonky, I'm the one who can't thread a needle.