Start doing revised 2020 thinking in a few weeks when we know more.
3 different scenarios - optimistic, pessimistic, realistic (super green, red, green).
State and note your assumptions clearly for each scenario:
How long will we be sheltering in place? What impact will this have? Watch what is going on in China - they are ahead of us in this crisis by 60 days.
How much revenue impact will we experience?
If you are able, look for opportunities - new revenue, acquisitions, finding good people will be possible.