Here's a recent conversation I had with a friend:
Me: "I wish I had more friends. You guys are great, but I only get to hang out with you like once or twice a week. It's painful being holed up in my house the entire rest of the time."
Friend: "You know ${X}. You could talk to him."
Me: "I haven't talked to ${X} since 2019."
Friend: "Why does that matter? Just call him."
Me: "What do you mean 'just call him'? I can't do that."
Friend: "Yes you can"
Me:
Later: I call ${X}, we talk for an hour and a half, and we meet up that week.
This required zero pretext. I just dialed the phone number and then said something like "Hey ${X}, how you doing? Wanted to talk to you, it's been a while." It turns out this is a perfectly valid reason to phone someone, and most people are happy to learn that you have remembered or thought about them at all.
Further, I realized upon reflection that the degrees of the people I know seem related to their inclination to do things like this.
I think it falls into the category of 'advice which is of course profoundly obvious but might not always occur to you', in the same vein as 'if you have a problem, you can try to solve it'.
When you're looking for something you've lost, it's genuinely helpful when somebody says 'where did you last have it?', and not just for people with some sort of looking-for-stuff-atypicality.