My strategy for dealing with stress is called "reframing" in Cognitive Behavioarl Therapy. More specifically when I find myself saying "OMG, I don't know how I will deal with X! How will I ever survive?" I replace fear of the unknown with curiousity. The words are the same, but the emphasis is different and the question is no long rhetorical, but becomes real.
For instance, I've been at the startup game for more than 25 years. It's a tough game, and like most people who stick with it that long, I've run out of money personally and several of the companies I have founded or worked for have also run out of money at times. Some of the companies didn't make it, but I'm still alive, and so are the people who worked for me. And I still starting and growing companies. So obviously running out of money is not fatal.
Running out of money is uncomfortable and I have had to deal with it in different ways at different times. It's not something you wish for, but life is full of ups and downs, and it is just one of the downs. The only way to avoid all the downs of life is to not play at all - which is an alternative that doesn't interest me.
So now if I don't know where next month's payroll is coming from I don't freak out, I get curious -- will I run out this time? Or will something amazing happen to make things work out before then? If I do run out, what will happen this time?