One fun way to help reduce waste is to up-cycle your clothes. I don't mean trotting down to the local flea market or thrift store, though that's good too! I'm talking about taking something you own that you no longer wear, and re-purposing it to be a completely different thing. A stylish and gorgeous thing though. Perhaps you could turn an old pair of jeans into some side-stripe pants, or a purse. Maybe transform a nice blouse into a windbreaker or silk jacket. Some too-large jeans into a denim skirt.
If you prefer to buy already repurposed or recycled brands over DIY projects, there are some companies that have made a name for themselves with their focus on recycled and up-cycled clothing.
The denim purse at the end is incredibly cute!!