OK, with all the bad news, I couldn't resist this one.
The best way to motivate people to do something
is to put up a sign saying
A water Bed in a German furniture store.Note that the sign says Not to get on the bed, but oh well..watch people trying out the water bed. It's in German, but that only makes it funnier. One wonders about the 'laughter if an American store did this , in our litigious culture!