where are you from? that might help us know what to tell you since we can kinda know what to compare it to
Lets see, when you see flashing lights behind you... MOVE OVER!! Americans dont even do this, but its common curtesy, as i'm sure it is in your country too
Tips... very few hotels in America have bellboys anymore, its rare unless you go to a high-end hotel, so i wouldnt worry about it. Most hotels will turn down the sheets every day, so if you have anything of value in the hotel room, hide it or put it in your rental car... too many horror stories. Plus, if you have money out on the table or somewhere in the hotel, the staff cleaning the room will think its a tip. Just an FYI.
Dont mess with the aligators in FL, they get touchy about that...
Act with confidence when you travel and go places, honestly... people who prey on foreigners can see who's "lost" when they go places and when they arent from the area. Act like you've been there 100,000 times before. The black socks with open toed sandals give away a tourist from 10 miles away