Four years is a real sample, so I won't treat this as a joke thread. My guess is the mineral water has little to do with it and the walking has a lot. A town laid out around colonnades hands you a twenty-minute loop you can take straight after a stop-out, and that loop is much better for the next decision than the fridge or the phone.
I try to copy a weaker version of that at home: laptop closed, out the door, no market talk until I'm back. Did moving to Karlovy Vary change your trading hours as well, or mostly what you do in the gaps between sessions?