The list you see when you click Find Latest Posts are all links to the threads and posts you made. The thread title is given twice, and the beginning part of your post, which should jog your memory enough to find what you are looking for. If you click the first thread title of any post in the listing, it will take you to the OP. Clicking the thread title link directly above your posts directs you to that post. If it was longer than 500 posts ago, if you got a "Like" on the post you want to track down, you could laboriously wade through your likes received to try to find it that way. That seems a lot of work, though.