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Save up: for the things you would like to do. Eating, shopping, partying and other extra excursions will cost you an extra coin. It is not a good feeling not being able to do something because you don’t have the money for it and you know you could have.
Inform your bank: in good time to allow your transactions to go through. You can’t look cool when your card is declined. It is embarrassing even if you don’t care about what other people think. Or you could travel with cash. Whatever works for you.
Use a map: you would rather look like a tourist than be lost. An elaborate physical map is better because if you depend on it you could run out of battery or you could get really slow or limited phone service.
Ask: Directions, price, for bargains or whatever really. Just ask. If you do not know something, ask. You will be surprised how many people are willing to help you. Who knows, you could as well make a friend for keeps.