Hi Manss,
You can try and make friends with some of the folk here and then send each other work through private messages.
If you're really serious about decent crits, I'd recommend looking for a writing group in your local area.
It's easier to network with people when you've met them face to face too.
Oh and if you're really hankering to get 50 posts, it's easy.
Go on a political thread, state your opinions and in no time you'll get into an argument that will build up 50 posts in a flash
Be aware though, just because you post something in SYW doesn't mean people will read it.
That's why I'd advise a more intimate writing group in your area.
Best of luck.