I've been considering switching TV providers from Comcast cable to Verizon FIOS. Verizon is my local phone provider and they keep sending me fliers in the mail to switch to their FIOS TV service. I looked at their website and they are charging $12 less a month for the HD channel package and they have an offer for a free DVR for 12 months. I pay $14 a month right now for my DVR from Comcast. So if I switched to FIOS for a year I'd be saving $26 a month off my bills.

15 minutes saved me $148.
Now I could have saved about as much by switching to Verizon. But there is still a bit more time and effort involved in that and right now my Comcast service is working just fine for us.
If you're considering switching providers just to save some money then why not give your current provider a call and see if they'll offer a discount to keep your business. This tactic could work with cell phones, cable TV, Internet providers or any kind of service fee where they have competition and offer discounts to attract new customers.