I've been a visa requiring foreigner for about a third of my life, and I have found that apart from being nice, humble and unassuming the best is to dress conse

I've been a visa requiring foreigner for about a third of my life, and I have found that apart from being nice, humble and unassuming the best is to dress conservatively, be clean and just basically look like you are too conservative to break any rules. Also make sure you carry the right papers, know all the questions and have answers to them, and have enough sleep beforehand.