Well, there are a lot of things you can do to help. Things that you might not know would help could make a difference.
Things that everyone can help out with:
1) Make topics, talk about something. Unless somebody starts something, SLS is pretty much just a memorial stone. It doesn't have to be RP or a serious discussion. Instead, I think something fun or engaging to talk about is what we need.
2) Voice, or should I say post your opinions and ideas. If SLS sucks, it sucked for a reason, and we need to know what that reason is.
3) Spars and RP are of course always welcome. But keep this in mind, SLS is NOT a Roleplaying Forum with storylines, moderator-manipulated-events, in-depth RP system or anything that you would expect from any average RP Forum out there. It is a tool for the roleplayers on SL to enhance their RP experience, to do what they couldn't do on SL (No, adult love scenes are not allowed on SLS either!), like posting their sparring records for example.