What are some dos and don'ts in Cuba?
Do learn some Spanish if you can. Without communication with locals, Cuba is a lot less interesting.
Do tip, but don’t overtip. 5% is sufficient and 10% is extremely generous. Any more is considered flaunting your wealth.
Do bring everything you need. Finding simple things like deodorant or sunscreen can take a day.
Don't follow street hustlers who tell you they will show you the way without you asking. It’s likely they are expecting money, ignore them as well as possible.
Don't try to get in line without yelling "Who was last in line" or "¿El u´ltimo?” If you see a group of peope waiting around a window or desk, there's actually a 'line' or 'queue ', it's just that people may not be assembled in any order.
Do trust strangers for help when you need it, but only when you initiated the conversation.
Don't throw toilet paper in the toilet. Instead throw TP into the trash can, which is common in many Latin American countries.
Don't flaunt money or expensive jewelry in the street. Use common sense.
Don't drink water or juice or something that contain ice or non-bottled water. Bottled water is plenty and cheap.
Do change money in official Cadecas or change houses. Alternatively, exchange in an airport, hotel or bank. Do count your change, short-giving is a plague in Cuba.
Don't spit or blow your nose in public, it’s considered offensive. Don’t worry though, you’ll just get some funny looks.