Clothing
3 sets of light cotton + 1 warm layer + 1 rain shell. Modest cover-up (long sleeves, scarves) for temples + mosques + gurdwaras. 1 pair of walking shoes + 1 pair of slip-ons (for temple entries).
Meds + toiletries
Immodium, Ibuprofen, oral rehydration sachets (Electrolyte / Dioralyte). Anti-mosquito 30% DEET spray. Sunblock factor 30+. Small first-aid kit. Anti-fungal foot powder (monsoon). Sanitary products (available but limited; bring your own for peace of mind).
Tech
Universal adapter (India uses Type C + D + M sockets — a universal one covers all). Portable battery (5,000-10,000 mAh). Kindle with a wide reading list — Wi-Fi is patchy on trains and in the northeast.
Documents
Passport + visa printout + 2 passport photos + one photocopy of the passport + local emergency contact + travel insurance details. Store in the hotel safe, walk with the photocopy.