Today, a friend of ours, who's hooked up with the works—super high-speed internet access and premium cable with DVR and HD channels—but was sick of how much he was shelling out for it all, successfully slashed his monthly bill in half. All just by calling and asking for it. Even if you're not a new customer, as long as you've had a good relationship with your provider you should be able to take advantage of specials. All you've got to do is ask...
Call your cable provider and ask for whatever promotional deal they're offering new customers (or bring up a competitors rate). Sometimes it's just that easy!
But if you're dealing with a hardball, try this trick from My Money Blog: Ask to cancel your service, and then actually cancel it. Tell them you'll need some time to set up new service and set your cancel date for 2 or 3 weeks in the future. Then a few days later, call customer service back and tell them that you'd like to reconsider their business if they could offer you [insert great price here].
Chances are, you'll get your price. Just remember to ask them to remove the previously set cancellation date.
If you're still not getting anywhere, it might be time to cut the cord and cancel your cable.