Not Changing Your Default Passwords
There are plenty of everyday, internet-connected objects in your house that can be hacked. And if you don’t change the default passwords for those devices, you’re only making a hacker’s (illicit) job easier.
If there’s a device that has a password, such as a router, modem or another smart IoT product, it’s strongly recommended that you change the default password for it. If not, someone could easily find that password with just a quick Google search.