Saving money on homeowner's insurance

I've learned, in the course of my shopping for homeowner's insurance, that the insurance companies don't like fuse boxes. This was finally made clear when the company I buy my auto insurance from refused to insure my house when they learned it had fuse boxes. A couple questions to another insurance company revealed a huge difference in premiums if I replaced the second floor fuse box with a circuit breaker. The difference was such that it would pay for the circuit breakers in two years.

This seems like it might be useful for others trying to lower their insurance premiums.