On a personal level: prepare a bug-out bag and practice migration; hoard enough food to last triple your household a couple weeks; get used to poverty; vote for the leftmost viable candidate in every election and primary;

learn useful skills for a disrupted society such as first aid, de-escalation, crisis counseling, safely preparing nearly bad food, physical endurance and practical strength, mending, DIY, public speaking, herding large groups of people, recognizing "authorities" and other groups' hostile intentions, violence, transformative justice, etc. ;

organize with local anarchists/leftists and wean yourself off the capitalist economy; learn to take care of your own emotional state and how to cope in a healthy way with huge amounts of stress; learn languages that will prove useful in mass migration; etc.

We are human. For millions of years our ancestors have lived through cycles of plenty and famine, surviving plagues and crop failures and massive droughts. We have evolved to handle crises such as this.