Here's just an idea. For the "Question Of The Week."
Each week a moderator (or someone who works for Sweetwater) posts a main question. Then, there is just a small explaination with the main question and sub-topic questions.
Then every article get read and graded by a judge. At the end of the week the judge picks 3 winners- 1st place, 2nd place, 3rd place. Each gets a prize, such as
First place: $100 store credit
Second place: $50 store credit
Third place: $25 store credit
or less store credit if you wish. Or you could just give out a random prize to the #1 winner that week; such as a microphone.
This is good because it attracts more people to the forum and site. Also, you can publish the best articles on the main Sweetwater website- you know, make a little section for all the best articles.