The two previous suggestions will just encourage constant spam.
You need to think of something that's going to work to the advantage of ALL the members. Not yourself.
Don't try and bring up ideas of bonuses for most submissions or most posts/threads made. These encourage people to post stupid, one word posts which have no relevance, and make the forums look sloppy.
Rich, did you say there was an option on this place somewhere to change the color scheme? Cos quite frankly, the grey and orange are kina...yucky. I'd like to view SC in the original Blue and yellow colors if possible.