What's A Universal Tip When You Travel To Your Country That People From Other Countries Might Not Know?

I visited the US recently and saw a post of someone asking for tips for their first trip from Mexico to the US. I immediately chimed in after reading the comments showing what people from the US took for granted that we do not do in Mexico.<br><br>When people from other countries comment on these types of things it showing what us take for granted.<br><br>So share your country and a tip!<br><br>Edit: I was expecting people to comment things people from the US don't do in other countries.