Your Passport: These are important details which should be taken care of at least two months before your wedding. If you do not have a passport, apply for one at your local Passport Office, fill them out and mail them to your nearest passport office. You will need two passport sized photos (head shots that are 2" x 2", full face, and on a plain background) plus proof of citizenship (A certified birth certificate bearing a state seal and your date of birth). Having a passport is a good idea in general.
You can check details by calling your country Passport Information Center should you require visa for any other country while travelling on your honeymoon trip. Its good practice to check and be sure that you have all the required visa for the countries you are travelling and should you required one. There are some countries required transit visa please check with your passport office.

Passport generally takes 6-8 weeks to complete and some countries provide express service after charging a extra processing fee.

The first thing you require while travelling to India is the Visa of course. Foreigners desirous of visiting India can do so after obtaining a visa from the Indian Mission in the country of their residence, or in a country nearest to them. People of all nationalities are welcome to visit India for tourism, business or education. All visa applicants must posses a valid passport of their country of citizenship.

Tourist Visa: Usually a multi-entry visa is granted for the purpose of tourism.
Transit Visa: Transit visas are granted by Indian Missions abroad for a maximum period of 15 days.
Business Visa: A foreigner can obtain one from an Indian Embassy or Consulate abroad.
Student Visa: A student visa can be obtained from an Indian Embassy or Consulate abroad on the production of proof of admission and means of sustenance while in India. The visa is valid for one year but can be extended in India for the duration of the course. Conference Visa: Delegates coming to attend international conferences and/or exhibitions in India can be granted Conference Visas to cover the conference as well as for tourism in India. Delegates are advised to apply to the Indian Embassies well in advance. Religious missionary visa: Religious missionaries can obtain visas for single entry and duration as permitted by the Government of India.

Writers who are known to have offended religious sentiments have been refused visa in recent years. Foreign religious preachers known, or suspected, to be able to arouse religious passions that can disturb peaceful co-existence of all religions, are unlikely to be given visa.