• Be sure to have your travel documents in order. You will need a passport as well as any necessary visas for the countries you plan to visit before confirming your travel plans.
• Plan your trip as much as possible before you leave. It can be quite difficult to get reservations at the last moment in a foreign country, especially if you do not understand the language.
• Budget your expenditures. Try to estimate your average cost per day (food, accommodation, and sightseeing). Remember to factor in travel insurance, emergencies, and shopping as well!
• Purchase travel insurance. Travel insurance usually covers many factors like missed flights, lost baggage, and medical emergencies. For a few extra dollars it can save you not only money, but your vacation as well--not to mention peace of mind.
• Avoid looking like a tourist by dressing conservatively and being inconspicuous with your camera and map. Leave your expensive jewelry in your hotel safe--or better yet, at home. An affluent appearance makes you a more attractive target for thieves.
• Carry your valuables in concealed inside pockets or in a sturdy bag that closes securely and has a strap across your chest. Handbags, outside pockets, open shoulder bags, and fanny packs are all easy prey for pickpockets and thieves.
• Put your name, address, and telephone number on the inside as well as the outside of every piece of luggage. This will help in identifying your luggage if it is lost or stolen.
• Note the credit limit on your cards. In some countries, you can get arrested for exceeding your limit. Keep a copy of the contact numbers of your credit card companies with you. Usually the toll free numbers are not valid outside of the country of issue.

Source: Weather.com