In my opinion, I think the best thing to do is to forget about "what to do" and just concentrate on garnering all the crypto knowledge you can get, I mean, the forum is all about discussing Bitcoin, other cryptocurrencies and other whatnots as well, thus when you have as much knowledge as possible, then communication on the forum becomes effortless for you, and that will transcend into making better posts of pretty high quality, and by extension you can thus "grow" your account. But mind you that growing your account should not basically be your sole aim, but the knowledge I've already spoken of earlier.