You need do nothing if you have your COSS TOKENS on the COSS EXCHANGE itself. The distribution happens on your dashboard on a weekly basis but you must press the distribute button in order for the DAO to release the specific tokens you want releasing in your wallet. I tend to only do this every few months because there are not many coins there right now and it is best to wait to save on fees otherwise you pay more fees and that is not good for your pocket. I will check every 3-6 months then do a fee split distribution I think.