Ignoring main stream adoption, which I think is a far off goal, trying to get more quality projects to run on the chain. As a reasonably fast block processing chain with, essentially, no gas fees it should be a place people would want to bring block chain projects.
But, there's a lack of clear documentation and easy to find resources to build on-chain tools. The SEO is pretty poor as well. Trying to Google things related to Hive tends to give a lot of "Hive" results that aren't this block chain. So, I guess the thing to do would be to build better software development kits for various code bases to make it easier to work on Hive, try to entice projects that this is a good chain to run on, and then get people using Hive via those projects.
RE: How would you do Marketing for Hive?