1. I stopped talking so loud in public.
It’s funny the things you notice when you go abroad. One of the first things I observed was that as an American I spoke loud in comparison to Poles. When I first got to Krakow, a Pole told me that Americans speak at a level of 10 while Poles speak at around a 4. In Krakow, conversations are barely above a whisper, and even at bars it was relatively quiet. I quickly learned to be aware of my voice so to not be labeled as the stereotypical loud American.