At work, it’s kind of a mandatory thing, I mostly use it (“him”) for guidance within the organization. I used to learn a lot about testing from him but now the tables have turned! 
People just come up to me online in communities like this. Asking if they can be mentored. depending on what they want I accept.
I always set up an initial call to check their goals and what they want out of it, if they have the time to put in some effort. Some people only seek chat/written mentorship and that’s fine too. They come to me with a question on how to test X or Y in a situation and I just tell them what I would do for example.
It’s very different from mentee to mentee. Some show me an application and we’ll do things together, if they need assistance to for example perform a race condition test for the first time etc etc
I have no time limits, I’m always happy to help unless the mentee puts in 0 effort obviously.
If they want to learn automation and I’ll give them “homework” and they’ve commited towards that and don’t do it over and over, then they are just making a joke on themselves. (not sure what the real expression is but you get the point
)
Meeting up with people is also very different:
- Some just ask if they can have a call and then we talk/show some stuff.
- Some we just have a Bi-Weekly meeting of 1 hour.
- Some just spam with me questions and I try to answer them all as best as I can

For me it’s a knowledge transfer in both ways, I like to share my knowledge but I also like to absorb knowledge, the best way to learn is to teach others. When people are stuck with a problem which I don’t know either, we’ll look for a possible answer together and we both come out smarter. Sometimes people have different thinking patterns and it gives me extra ideas for testing challenges also!
It’s also a very nice feeling when after you’ve coached someone they contact you back after a few months and say stuff like “I can apply what I learned and found so many bugs, all thanks to you!”
Who doesn’t like a pad on the back 
All of them started online and 1 through work (they all just contacted me, simply by a DM).
Just an FYI: I don’t ask for payment or anything (so it’s not an “official work thing”), people literally just ask for mentorship and I spend my free time doing it if I have the time 