I think guest blogging can work really well if you find the right blog. Personally, I’ve not had a chance to do that, but I can say that Medium has started to give me a few opportunities in terms of writing for two or three publications. It’s a good start that I think can be a great platform from which one can start expanding to other publications.
I will say that LinkedIn is another place where you can potentially find some reach too. Often times I think people underestimate the untapped potential of LinkedIn once you figure it out. It’s not the easiest platform, bu that goes with any other one too!