My grandmother is Japanese. We've always taken our shoes off in the house. I never thought much about it, since it was just part of our lives. Even guests must take their shoes off in our houses. As it turns out is good in terms of keeping bacteria out, chemical toxins, dirt, protects your floors, and makes your feet happier (because they can move naturally).
There are plenty of studies to back these things up, but the point is- it's a good practice that I gained from my grandmother's cultural background. And, I'm sure there are plenty of other things other countries are doing whether it's in what they eat, how they exercise, or even how their country is structured...
What other practices in lifestyle or otherwise can we adopt from other places to improve our own lives?