don't assume you knows everything
it is always smart to learn everything first hand. if you have the right mind, you should consider nothing is the same as to what we have or how do we operate here. for example, if you are going to China, the communist country as your destine, you will need to learn a lot more before you taking such risk.
you must have list of phone numbers, copy of your passport, and money access no matter what for emergency. you also should keep close contact with your family, friends, now it's not the right time to be isolated or disconnect. you then should try to learn the language as much as possible and have close friends to help you oversea.