I saw this very good advice and thought about what would have been the guidance I would have got when I was doing my PhD, in my time and place. Probably this one. https://twitter.com/wgervais/status/953955260846039041 …pic.twitter.com/FVJyzhTYO9
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BTW since we're here friends outside work has been a thing that never happened for me. This isn't meant to be a value judgement either way, but my close friends are in science in the same field pretty much and I love them. Without you all, I'd be nothing. 
That's in reference to number 3 in list above.
I am an introvert and I came to science to find you all (amongst other things). 
That’s largely true for me as well. I have a few friends outside science, but they’re mostly nerdy/geeky folk I met online or through the tech scene.
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