The thing I like about Netflix, is they allow you to cancel/suspend your account, and provided you come back within 9-10 months, they keep all of your preferences and watch lists and stuff.
I tend to use this in the summer, as I watch less TV. I am just about gearing up to finish any series I am mid-season in, and not starting anything new. By the end of April, I will cancel, saving me the fee during the months I am not using the service. Then when evenings start getting dark again, I'll revive my account, and look at what new stuff has appeared.
It's not so much a way to save money, although that is always welcome, as if it isn't there, I don't waste sunny evenings watching it.