Warning: the following is arbitrarily trivial and most likely not worth reading.
On my way home from work this afternoon while suffering from a headache, I was suddenly struck with an inspirational idea (or, in other words, a completely useless idle thought that I figured was cleverly funny enough to be written down). So far, while the ubiquity of the metric system world-wide has caused it to be adopted within the scientific establishments even in America, the common American (and even common useage in Canada and Britain, though it pains me to admit it) still operates within the antiquated imperial system. Then I realised a brilliant way to start getting people to use the metric system - start referring to monetary units in a metric fashion. No longer would we have dollars and cents, but now we would have dollars and centidollars. You might get paid a decadollar an hour, and everyone would want to be a megadollaraire (or just megaire for short). The nice thing about this is it would not even require switching the magnitude of the unit, since a dollar would stay a dollar, so it would be much easier for people to get used to than having to start thinking in terms of meters instead of feet. Then, once the metric system terminology has been driven into the common mindset (while I recognize this is already partially being done by computer terminology with bytes, money tends to come up in conversation rather a lot more often), the rest of it might be more readily accepted.