Ransomware attacks are on the rise, and once your computer or network has been infected, it can be really difficult to recover. No More Ransom can help, and more importantly, help you now, before an infection, and later, after one.
The No More Ransom site does a couple of great things. First, if you or a computer you use has already been compromised, you can upload an encrypted file and the details of the ransom letter you received and the service will analyse and tell you what type of ransomware you're dealing with, and who's behind it, if they know.
If you just want to protect yourself however, the site has plenty of tips to make sure your files and everything are safe and secure, starting with keeping regular backups. From there, it's all about using robust antimalware tools on your computer, and learning a little internet savvy and good web hygiene (turning on "show file extensions" and never opening files or attachments sent to you by people you don't know, and even then checking on ones from people you do know.)
The site is the result of a partnership between Intel Security and Kaspersky Labs, so keep an eye out for plugs for their specific tools and technologies, but overall the material there is correct and helpful -- and worth a bookmark if you manage computers, work in IT, or are just worried a family member may call you one day asking whether what a Bitcoin is and why someone is demanding thousands of dollars in them to unlock their PC.