So, where do you buy them? Online or in a store?
We called the cable, Internet service provider, cell phone, and land line companies to find out exactly what services we were paying for and then think about what services we were actually using. Gets complicated since we have three people in the family and three residences in different towns. We bundled some stuff, got rid of some options we could do without or were not using, and in one case actually got more service for less money. Anyhow we saved a lot of money doing this.
For example, our daughter would rather text or email us than call. We were paying a lot for minutes she didn't use and were paying extra for her overage on text messages. The cell phone company isn't gonna call you and say, hey, you aren't using what you're paying for, etc. Anyhow, it's worth checking such things periodically.