You should consider many things before you travel. The following advice may be helpful as you prepare to travel. Before you go, do your research about the country you plan to visit and learn a few phrases in the local language.
It would be a good idea to arrange supplementary health insurance and travel insurance. Carry proof of insurance coverage, and give a copy to someone at home. Have any required vaccinations. If you are taking medication with you, make sure you keep it in its original container. Carry a doctor's prescription for any controlled drugs, and if you use syringes, carry a medical certificate. Leave copies at home as well.
Make sure your passport has not expired and is valid for six months beyond the time of your trip. Photocopy the identification page and keep it separate from your passport. Leave another copy with someone at home. Make sure you have any visas you need.
Keep the original receipts for any purchases you make, as well as for your hotel bill, rental car agreement, and medical service bills.