Worrying--oh my do I have to remind myself of this. If there is nothing to be done about an impending event, why ruin today worrying about it. This comes in handy why I'm flying (actually, came in handy, because I don't fly anymore). I work myself into a frenzy before the trip, on the plane. Ridiculous. If it crashes, it crashes. Worrying isn't going to stop that.
I think in a way, worry is a way of trying to control an event. It's a kind of guarding. We think if we aren't vigilant, then bad things will happen.
Totally irrational :)))