Still trying to find that elusive writing contest that you don't know about yet :p I think I'll have to create one so I can be the first to know :D
I do believe that participation is the best way to get contribution from the community, and there are so many contests that provide good incentives for participation and helps you connect you with other people as well.
I mentioned about the importance of contests to beginners to @ethandsmith, so I think you should try to promote your contest list over at his Beginner's Guide to Steemit (if you haven't already done so).
If you create your own you can let me know about, so you'll be the first, but even if you don't tell me...I'll find it LOL.
Speaking of contests, I have a new one brewing. All about pirates and tales of derring do' and...well you'll have to wait and see matey!