Usually if I want to post something in a long thread that I haven’t read all of, I’ll use the search function to try to see if someone has already posted that thought. Of course it may or may not help, depending on the wording used, but by doing that I have sometimes found that my brilliant thought/news/reference/pun was already posted in the topic.
Also, as folks may know, putting an already-posted-in-the-topic link into the reply-composing window will get you a note saying that that link has already been posted in the topic, so that’s handy. You can check out the context that the other person used it in, and decide whether your re-posting of it would add anything to the conversation or not.
