By changing my car insurance to a different provider.
I changed my car last November and took out a new policy before the EU changes came in that meant that women's policies would no longer be any cheaper.
I have also had a fault accident in the past year.
When my renewal came in costing more than last year I thought that was probably that, but I spent 30 minutes searching various sites and have saved £180 and also have a lower excess!
The new insurance is through Tesco Bank - not to everyone's liking I know but it suits us.
Whoopee!