I just learned about this. You can install it as middleware on a django server and if you're an administrative user or coming from an authorized IP address (I'm using 127.0.0.1 and coming in over an SSH tunnel), it will report on query time and stack traces for all of the SQL queries made by the django ORM, and lets you run SELECT EXPLAINs on them.
It also extends manage.py so you can instantiate queries in real time and see how the SQL changes.
It's in ubuntu's universe repository (apt-get install python-django-debug-toolbar), and has already helped me figure out why my server started swapping out when I visited a certain page. Wheee!
I start off frustrated every time I look up how to do something and find that the only hits are Youtube videos. I prefer to just glance at some written instructions quickly rather than sit still for a 10-minute video.
Then It occurred to me that if the only instructions on how to do something are videos, it's probably something simple enough that I can figure out on my own without a stranger's help.