Your passport, visas, travel insurance, and copies of all relevant documents are necessary for overseas travel. Bring the required chargers, a power bank, an unlocked phone with SIM or eSIM, and a universal adapter. Carry your medicine if required, hand sanitizer, toiletries, and a reusable water bottle. Bring packing cubes, a sleep mask, a neck pillow, and a safe money pouch for convenience and organization. Always have some local currency and a backup card with you, and you'll be OK!