Follow all of the security processes listed above (browsing the web with caution, staying alert for phishing attacks, being cautious of what content you download or run, etc.), and if you do happen to become infected, unplug your blue Ethernet cable or remove yourself from WiFi completely, and turn off your computer IMMEDIATELY. Removing yourself from the network may prevent the ransomware from spreading through the network and infecting more files. Aside from that, there's not much anyone can do after they have been infected besides lose files or tons of money, so its vital that we avoid it in the first place, but no pressure.