1. Always pack a small towel as it is useful for drying off at beaches, picnics, or when needed, even though hostels often provide towels. 2. Buy a small backpack around 35-40 liters to force yourself to pack lightly and avoid overpacking. People tend to fill available space so a small bag prevents bringing too many things. 3. It is okay to wear the same t-shirt for a few days when traveling light. Take half the clothes you think you need as you likely do not need as much. Make a list of essentials and only pack that due to the small backpack size.