In "sticky" format, as in it stays as the top thread and never moves.
One for asking random questions like a "where is the thread about ___?"
Or (and this is my actual question today) "There was a thread that mentioned a sort of heavy duty tarp but now I can't find it, anyone remember which one it was?"
In fact, some stickies in a few threads would be great like the first post being about links, info, book lists etc where to find stuff like that. A sticky about formatting posts. Etc. Lots of websites do this, it's pretty handy for finding stuff without having to start a new thread for every question.