I've noticed over the last few decades that every time I start worrying about WW3, climate change, solar flares, super volcanos, giant meteors etc. that there's something going on in my personal life that's causing me stress. Something I feel like I have no control over.

I guess my brain doesn't want to admit/deal with my own issues, so I focus on something else, something that feels just as overwhelming.

Working on taming the anxiety itself is quite useful, especially if you can't help the situation you're currently in.

The things that have helped me the most are: meditating (chakra and mindfulness) which has been great at helping me calm down; finding activities that feel meaningful to me; spending time with the people I care about (making the time); and finding beauty and/or amusement in everyday life.

All of these things take practice and time, which might seem useless if you think that the world will end tomorrow. But even if all you can do is one meaningful/fulfilling thing today, then it will improve your day and help make your last day on earth a little better.

Of course chances are good you'll wake up tomorrow, and the next day etc., which means you have even more time to live an even happier life.

Good luck my dude.