As your link says, I think people use a mix of different resource models. For myself, I seem to have a momentum model for "thing-y" work (engineering, paperwork, cleaning, etc.) but a resource model for "people-y" work. Most importantly for me, depleting my "people-y" resource will knock out my "thing-y" faculties: 10 hours of coding leaves me tired but OK and I'll be good to go again the next day. A two hour client meeting leaves me drained for a couple of days, during which I'll be no good for client meetings OR coding.
This sort of thing is why I picked up (from other tumblr articles) using "Spell Slots" as a more appropriate / broader analogy for me than "Spoons". Most people these days are familiar with D&D-style spell slots or CRPG-style "hot bars" and the concepts that individual slots may have very different "cooldowns" or "rest requirements" (encounter slots versus daily slots, in the direct D&D analogy) from each other and that you generally have a mixture of them and different "spells" fit different slots.
I'm an extrovert with a compromised immune system. I generally find meetings energizing because I'm a people person.
When I don't, it's usually because the people I'm meeting with just are unwell and germy, even if they aren't actively coughing and sniffling. In such cases, showering as promptly as possible afterwards and engaging in self care to support my immune system helps me recover faster.
I will note the coffee and alcohol mentioned in another comment both have moderate medicinal effects, as does spicy food. (But it does so at a cost because it's a stimulant, not nutritional support. It doesn't give the adrenals more to work with. It just runs them on high, basically.)
Alcohol is an antiseptic and helps kill germs. Anecdotally, I have heard of cases where an improperly prepared meal caused food poisoning in the folks who did not have alcohol with the meal, but not in those who did have alcohol with the meal.
Caffeine boosts the adrenals, which helps with immune function generally and allergies in specific.
There is no life hack to change an introvert into an extravert. Not really.
The best I figured out is to maximize energy levels at all times - increases likelihood you'll have any to spare. (Diet, excercise, meditation and the hardest, good amount of sleep.) It is a limited improvement at best.
For me, physical exercise helps with "thing-y" stuff but not "people-y" stuff. Meditation doesn't help me with anything (despite, or maybe because of, having grown up with a parent who was obsessed with that kind of spiritual woo). It basically just comes down to it taking a lot of mental energy for me to be "sociable", which then gets exponentially worse when I'm also trying to be "professional" and represent my company to a client.
I'm an introvert who kind of likes people (but get drained a few hours after spending time talking) and my go-to has been tons of coffee. (when I was younger booze was good too, for social situations, not client meetings, but I had the same issue with social stuff generally)
