Start off your trip right by packing a carry-on bag that contains essentials; toiletries in three oz. sizes or less, one set of clothes (in case your luggage gets lost), your passport, any medications or important items.
Make sure you have all of your immunizations done four to six weeks before traveling. Recommended by the Center for Disease control are routine immunizations (Such as MMR, DPT and Poliovirus), Hepatitis A, Hepatitis B, Typhoid, Rabies and Malaria.
Make sure your Tourist Visa to the DR is in order. If you have purchased a tour to the DR from a tour operator, you will more than likely purchase your Visa upon entering the country for $10, as of September 2010.
Being a predominately Spanish-speaking country, make sure you learn some key words and phrases in Spanish. It can be helpful to bring a translator or guide book for reference.
It is suggested by the U.S. State Department to register with the U.S. Embassy while visiting the DR. That can be done easily via the State Department's travel registration website.
As with most foreign countries,street crimes and petty theft is popular. Be careful of pickpockets and do not wandering into areas unfamiliar to you. Do not leave any valuables unattended.
It is recommended to not wear jewelry or flashy clothing, limit the amount of cash and credit cards you carry with you and store valuables in a safe place like a hotel safe.
Disease from food and water is one of the leading causes of illness for foreign travelers.
Do not drink the tap water, fountain drinks or use ice cubes in the Dominican Republic. Make sure to purchase bottled water only, or drink carbonated beverages.
The food of the Dominican Republic is an exotic mix of Spanish,Taino and African. The dishes are very similar to ones found in other Spanish countries, but make sure all food is fully cooked and try to avoid dairy products unless you are sure it has been pasteurized. It is recommended to NOT eat food from street vendors.