In the case of my Daily Challenge, I gave permission for anyone to just present a challenge for a day. In every other discussion on the forums, you don't do that. Instead you create your own discussion.
Okay, it took a lot longer for me to get picked up to go where I'm heading, so... I managed to make a challenge. If you have any suggestions, I'll fix it when I return. Just decided it couldn't hurt to make one before I left.