Box Design Showcase
VISIT OUR NEW SISTER SITE
Introducing PosterMason! It's like VGBA, but for posters. Check it out and start submitting your work.
You could help people on the Requests forum, or you could just post in really active threads a lot.
The way I became famous is because I made a ton of useless threads, and then I stopped and here I am. I don't recommend that though :P