1. Visa: To travel to India, most nationalities require a visa. You can obtain an electronic tourist visa (e-Visa) online before your departure or apply for a traditional visa at the Indian embassy or consulate in your country. Be sure to check specific requirements based on your nationality and type of travel.

2. Currency : The official currency in India is the Indian Rupee (INR). You can exchange money at banks, licensed exchange offices and ATMs. Credit cards are widely accepted in hotels, restaurants and stores in major cities, but it's always helpful to have some cash for small expenses.

3. Health : Before traveling to India, consult your doctor for advice on recommended vaccinations and health precautions. Make sure you have travel insurance that covers medical expenses and emergency evacuation. Avoid drinking tap water and choose sealed bottled water. Pay attention to what you eat to avoid gastrointestinal problems.

4. Climate : India has a diverse climate, ranging from hot desert regions to cool mountainous areas. Be sure to dress accordingly and check the weather forecast for your destination before heading out.

5. Safety : Avoid carrying visible valuables and always keep an eye on your belongings, especially in crowded places like markets and train stations.

6. Culture and customs : Respect local culture and traditions. Wear modest clothing, especially when visiting religious sites. Ask permission before taking photos of people and be respectful of local residents.

7. Transportation : Transportation options in India include trains, buses, taxis, autorickshaws and ride-sharing services. Book your tickets in advance for long train or bus journeys, especially during peak tourist season.

8. Language : Although English is widely spoken in tourist areas, learning a few basic words in Hindi or the local language can make communicating with locals easier.

9. Tipping in Hotels : Tipping is generally appreciated in India. In hotels, it is common to tip room attendants and porters. A tip of 50 to 100 rupees per day for room attendants and 20 to 50 rupees per bag for porters is generally acceptable. If you received exceptional service, don't hesitate to tip extra.

10. Tipping Drivers and Guides : When it comes to drivers and guides, it is common to tip them for their excellent service. For drivers, a tip of around 200 to 500 rupees per day is generally acceptable, depending on the quality of service and the length of the trip. For guides, a tip of around 300-500 rupees per day may be appropriate, depending on the quality of their explanations and guidance.

11. Electricity : In India, the standard electrical voltage is 230 volts and the frequency is 50 Hz. Electrical outlets are generally type C, D or M. Make sure you have a universal adapter if necessary to plug in your electrical appliances.

12. Internet Connection : Internet connection in India varies depending on where you are. In larger cities and tourist areas, you will usually find Wi-Fi access in hotels, restaurants and cafes. However, the connection quality may be spotty. It is recommended to purchase a local SIM card with a data plan if you need a reliable internet connection during your stay. The major mobile phone service providers in India are Airtel, Vodafone Idea and Jio. Make sure your phone is unlocked so you can use a local SIM card.