Upon arriving at the bus station that is 13km from the Moray ruins and 4km from town, arrange a taxi there to take you to Moray and the Salt Ponds.
After getting dropped off at the bus station/turnoff to the site, there are two options. The first is to take a bus heading down into the valley to Urubamba and then a connecting bus to Pisac or Ollantaytambo. There you can eat and stay the night or take a bus to Cuzco. The second is to take a bus up the mountain that will pass through Chinchero on the way into Cuzco.