tp_info=1

Need to know the unique identifier for a given group or user? Or the XSLT that's rendering that page? Or any other info that's passed in the querystring? Pass this in via querystring (http://community.theport.com/?tp_info=1), view source, and search for "URL::". You'll see the raw URL.

tp_script=1

Another querystring param, this will highlight all of the modules on the page and tell you their name. Very handy if you're looking at a page with a collection of modules and aren't sure of their name.

Hope this is helpful to all the template authors out there!