Hello there!
Well, to be honest, the first question you should do to yourself is "Why I need to rank up?".
Be careful with becoming obsessed with ranking up, for it is now quite difficult due to the merit system. Nevertheless, you can learn from the best. Just take a look at the posting activity of users as DdmrDdmr or Bitmover, both have rank up in no time, thanks to their amazing contributions.
So, just learn from the best, be humble and never beg for merits or such a kind of attitudes.
The forum is a place for learning and discussing. So read, read and read and you will see how your contributions become better and better, and, with that, you will be able of ranking up.