As you may know from my YouTube series on minimalism, I am constantly donating items that I no longer use. I take things to thrift stores, charities, and consignment stores.
I just consigned online for the first time and it was so easy! Have brand name clothing to sell? Fill a pre-paid bag and send your garments to ThredUP. Rumor has it, they're not as picky as your local consignment store or The Real Real, another one of my favorite luxury online consignment sites.