I’m guilty of this. Know what is only needed.
Sometimes, we tend to bring a lot of stuffs: those which will look good on us on picture or those we think we’ll be able to wear but they took a lot of space of our baggage. It is okay to bring these stuffs for as long as we weigh them against other important things.
Consider the weather and the season. Check the places you’ll visit maybe they have dress codes. Grand Palace in Bangkok is a good example. Knowing what only is needed will also let travel shoppers fly back home within the baggage limit. I bet you don’t want to expose your personal stuffs with airport personnel. Right?