Bookmark your state's unemployment website on your personal device, if you haven't already. That way, if you get the news, you will at least have something within your control that you can do.
Clear out any personal emails & paystubs, if you haven't already.
When I lost my job at another company, I did these things & I'm glad... because I'm sure many of my co-workers were scrambling at the last minute, not seeing what was coming.
Reposting this from replies since everybody needs to read this. All credit goes to @igk+1gVcuGn6.