You Should make a stickie with tutorials for people. A lot of people ask "how do i do this? any good tutorials out there?...i know finding tutorials can be hard especially good ones. But i think if you have a stickie where... you can over time, add all the helpful tutorials to it, i think most people are after those. maybe break it down to different sections and have PERSPECTIVE,INKING,PAINTING,AIRBRUSHING the list can go on and on but i think having videos organized into different categories, that they can easily look through and find. It would be a lot of work for that stickie but i think in the end that will help people out a ton. a gerneral art forum tutorial stickie.
Also maybe put this in there also......have a list of art related drawing books for people to get. to help them improve, figure drawing, gestures, ect.
Share uploaded deviations on other social networking sites such as Facebook, Tumblr, Twitter etc. Participate in, or host contests! Use the search to find other artists that have similar tastes, talk to them, make friends! It goes a long way and can help you improve your artwork a lot Participate in groups The Thumbshare forum! Always do your best, and strive to improve.
Coolness. I like stickies that help new folks out.
My tip would be for a new member wanting some longer-term exposure is to treat others kindly and help with advice and/or time when you can. People do remember kindness and may give a friendly point to you in a journal/comment one day.