What are the things to consider when planning a trip to a country you've never been to before?

Study the following things.

*Climate and sudden changes, if any. Carry clothes accordingly.

*Accompaniment of knowledgeable local guide to understand the areas and language being visited.

*While on beach,avoid entering sea water and taking water sports if you do not know swimming.

1. Language.
2. local currency.
3. Clothing appropriate for the weather.
4. Knowing its History and important places. 

The visit has to be with a purpose and the planning comes automatically.

just you should take me with you ;) , then i will be responsible about every things

Language, local currency, Clothing appropriate for the weather and visit plan

Appreciation for your invitation.  Many things have to be considered when I am planning a trip to a country which  I  have never been there. These things as :

1- Knowing the formal language of the country

2- Level of the life and its currency

3- Culture level of the country

4-  Its religion and familiar habits and traditions

5- Knowing its History and important places

6-  Gross Domestic Production

7- Security Condition

8- Human rights respect