Pack a small towel, as you'll need it for various situations while traveling. Get a small backpack around 35-40 liters to force yourself to pack lightly. Take half the clothes you think you'll need, as you won't use as much as anticipated. Be sure to pack extra socks, as some will get lost or worn out. Bring an extra bank and credit card as a backup in case of emergencies like lost or stolen cards while traveling. Use bank cards with no foreign transaction or ATM fees to avoid unnecessary costs over an extended trip.