T-Minus two days and counting.
As realizations go, this may be so stupid that it's planning on voting for Trump for a second term but:
Yesterday I was trying to figure out my post-Barcelona plans and I was feeling a bit overwhelmed. No, that's not true. I was feeling a lot overwhelmed. So I got online and started looking at the map and at transportation options, just gathering some actual information instead of relying totally on, let's face it, guesses, and when I got up from the computer, I recognized that I was feeling much less stressed.
So, the realization: when you're faced with what feels like an overwhelming set of choices, do something--literally anything--to start narrowing down those choices, and you'll start to feel better.