A great suggestion from Jon Ericson is to have Weekly Topic Challenges, these would involve 4 steps:
Step 1: Ask for topic ideas.
Step 2: Post a challenge.
Step 3: Profit!!!! Tally the results.
Step 4: Repeat until no more topics are left.
For the full details, follow the link above.
What do people think of this idea? Do we want this on The Great Outdoors?
Here's one I started on Gardening & Landscaping beta We have 1 completed challenge and are working on the next.
Please post your feedback to this idea as an answer.