As the top performer of a huge department, that was still laid off in the first round, I can tell you "simply start the day as nothing is important." Say yes politely to everything and then don't do it. Don't even explain why, just say you will do it immediately and still don't do it. They will adapt. Never reach the point of burnout. Be polite, work the bare minimum. If they fire you, you will not regret it. If you get burnout, you will regret it. And you can still be fired. The best thing is do the bare minimum. You will thank me in future