Email Aliases — One Address, Infinite Variations, Zero Spam

Most email providers support aliases. With Gmail, you can add a plus sign and any word after your username — yourname+netflix@gmail.com, yourname+shopping@gmail.com. They all land in your main inbox, but you can filter them automatically. And if one starts getting spam, you know exactly who sold your data.

This is especially powerful for signups you don't fully trust. Give each service a unique alias, and you have a built-in tracking system for where your spam originates — plus an easy way to filter or block it.