But you get that from looking at new posts to old threads.

For me the only etiquette is to make sure your new thread title is descriptive and not just some kind of vague thing. I see on some forums threads like "How do I...." then the opening post has the actual question in it. Thats a "no click through" thread for me. So nothing like "Question about maps" etc. Thinking about it, even this thread should have had something more like "Question about new threads" or something like that instead of just for all cartographers - which is basically nearly all of us (hopefully !).