It's Halloween, so it's a great time to make sure you're not getting tricked out of your hard-earned cash and cancel those subscriptions you've forgotten about. Here's how to do it.

Digital hygiene, the practice of keeping a clean, safe digital footprint, is critical for anyone who uses the internet — which is pretty much everyone. Many things fall under the digital hygiene umbrella, from responsible email management to removing your data from data brokerage companies' websites.

There are many digital hygiene tasks you should do at least twice a year. For instance, you're probably going to want to check to make sure none of your passwords have wound up in a data breach.

But that sort of thing is for another day. Today, we're going to save you money by killing zombies.

Zombie subscriptions

Zombie subscriptions are subscriptions that you're being charged for without really using them.

Some businesses, like low-cost, high-value gyms, make a significant portion of their income from zombie subscriptions.…