Is there a good thread that deals with all these hidden gems. I don't like learning them by just stumbling upon them. Ie. http://xenforo.com/community/forums/have-you-seen/?prefix_id=34 - this URL is useful ... but I didn't know this ?prefix_id trick. If I use the regular search .. this throws an error (not using a search term or person). Is there a resource/help manual entry for these types of URL methods of sorting and searching ?