Be earth friendly. Bring some reusable bags; you can use it when shopping for souvenirs, or when you buy other things. When packing for your things, if possible, for the things that you just bought take it out of its packaging. By doing this, you will save some more space and these packaging and containers won’t be an added weight on your luggage. This simple act can reduce waste and it won’t be an added weight to your luggage.