If you have good answers to that question, please comment on this Samizdata piece.  Or, if you would prefer somewhere more private, comment here.

UPDATE:  Wow, they’re coming thick (if you’ll pardon the rather inappropriate adjective) and fast.  My favourite so far is this one, from no less a personage than the man from Devil’s Kitchen:

The first is trigonometry. I have designed a number of triangle-based leaflets and flyers and, unfortunately, DTP programmes are not good at dealing with anything that’s not rectangular. So, trigonometry has to be employed.

The second is quadratic equations. I used these when I was producing amateur theatre shows, with multiple ticket prices and audience distributions (yes, there are probably better ways to do this than with quadratics, but quadratic equations were what I remembered).

I would used the results to calculate budgets and ticket prices. I have produced 40 productions (including 12 in the Edinburgh Fringe) and never lost money, so that has been very useful.

I had no idea he produced Edinburgh Festival shows.  Blog and learn, my hearties, blog and learn.