3) Build an objective list of things to monitor in your business, with a plan on how to pivot
If you don't have key indicators for your business, sit down and make that list today. People will be reacting and feeling a lot of things in the coming months, but you need to focus on customers coming in the door and not the broader picture of what could happen. If sales start to drop, or customer interest starts to wane, focus on analyzing customers the same way you have before and don't give into uncertainty or national turbulence as the default go to explanation.

Despair and depression are powerful agents of change, but life will continue on in the midst of that and people will continue to buy things and invest in things while we see what kind of changes will take place. Stay focused on those objective metrics though, and prepare for what you'll do if those metrics start to shift. If you take the subjectivity and emotion out of the bottom line of your business, you'll find staying afloat emotionally is much easier to do.
Finally, take a deep breath and know that in any intensely emotional time such as this, things are often not as good or as bad as people think. If we band together in a hyper-local fashion, with small businesses and start-ups supporting each other, these next four years could go much better than anyone expects.