Ask HN: Up and coming marketing tactics 2017-2018

I've been doing vast research on marketing tactics and they all seem so repetitive, "use social", "SEO", "Content strategy" etc...

Everyone is doing these things, I'm looking for a practical, tactical approach that is up and coming, and hasn't been completely exploited yet, to test.

Let's make this the GO TO post for obscure but effective white hat, and grey hat marketing tactics in 2017 and onwards.