Put a Bucket in the Sink
Even if guests are using disposable plates and cups, parties somehow have a way of generating dirty dishes. Set a plastic dishpan in the sink and fill it with warm, soapy water. As empty dip bowls and serving utensils pile up, plunk them into the bucket. They're temporarily out of sight, and even if they remain there overnight, they'll be easier to deal with after a good soak.