It's actually quite easy, well that's a lie, because if you think of it as easy, it won't work, its just like anything.
Post quality content, good presentations, join groups, but post good stuff is the main part.
Look at the popular PMCers (whatever you want to do on PMC, look at the people who inspire you, study their things, not like steal them, but look at them, see how they do it. Then add your own twist and on it. Try to uphold your self to a very high standard, or else it will never happen. Find something that you really like, if you just do it for fame, you will never put in the quality that someone who does it for passion does. If you aren't good at something doesn't mean you can't do it, of course the popular PMCers weren't pros when they started, but with time and effort they made it.
That's all I can say, I feel I can give descent advice, I'm not famous on PMC or anything, but I sure have been here a while.
