How to encourage more women to cycle?

...The majority at our meeting thought that the LCC's Go Dutch campaign was the kind of approach that would be the most successful. Build the safe and pleasant cycleways and they will come, women, children, babies on the backs of bikes, as well as a few more men!

So long as they're proper cycleways (with at least equal priority to the car lanes) as in the Netherlands, otherwise they're worse than useless... but that's another thread.