Aggressive retention - stay strong!
I took out a subscription, and was locked into the 1 year minimum period (note this if you take the free trial - most other newspapers don't have this 12 month commitment on their digital products).
Over the year I grew less enamoured by the journalism compared to other sources and stopped reading. Cancelling by email was impossible - apparently they had to definitely speak to the account holder. In fact, it was just an excuse to deliver a lengthy retention speech (they didn't ask for any more verification information than I'd provided by email).
After 10 minutes of being encouraged to give it another go, and enduring the apparent disbelief that I could even consider giving up such a quality news source, the subscription was finally cancelled.
Stay strong when you call. And, even better, avoid subscribing unless you're sure you want it. In contrast the NY Times is easy to subscribe to, easy to unsubscribe from (with only a 1 month commitment), so I can pick up and drop as I have time.