Pack essential items like a small towel and extra socks. Bring a small backpack no larger than 40 liters to avoid overpacking. It is okay to wear the same clothes for a few days and only pack half of what you initially think you will need. Take extra bank and credit cards in case of emergencies like lost or stolen cards so you have backup access to funds. Also use bank cards that do not charge foreign transaction or ATM fees to avoid unnecessary costs adding up over an extended trip.