Simple traffic analysis. Parse access.log, inspect your traffic in the admin, discover common/recent error pages.
python-dateutil
$ pip install -e git://github.com/numerodix/django-access-log.git#egg=django-access-log
Then add:
INSTALLED_APPS = (
..
'access_log',
..
)
Then initialize the database tables:
./manage.py migrate access_log
./manage.py process_log /path/to/access.log
Then see the Access_Log app in the admin.