The New York Times has an interesting article about a company that has started, called BillFixers, which will act as your agent to cut your cable, internet, and other bills. They split the difference of the money they can save you, and that's how they get paid.
But Leo says there's plenty of ways to accomlish the same goals and keep all the savings for yourself.
1) Go to the retention department.
2) Be Nice.
3) Ask for a discount.
4) Know what the other guys are offering.
5) Avoid new contracts.
6) Ask for a one time credit
7) Write down the details of the offer and then call back to get confirmation.