I took the collectivo 1Sol one way to this places
1st: Tambomachay- just a stroll towards this aqua duct system. There's a path that goes up the opposite way so you can see how it looks like from above
2nd: Puka-Pukara- from the parking lot/entrance of Tambomachay, you can see Puka-Pukara. Cross the road and you'll end up there. From here, I don't feel like walking on the road so I cross the road and waited for collectivo( a cute mini-bus) for another sol. The driver dropped me at Q'enco, from here you can see Cusco, the statue of Christ down the road and the entrance to Sacsayhuaman, I saved it for my last day in Cusco. This sites are ticketed which means you have to have your Boleto Turistico. You can used it only one time for each site. From Q'enco, I took the collectivo again for 1sol then the driver dropped near Q'oricancha so I end up at the plaza and went to buy me a coffee and enjoy the rest of the day in the plaza. Happy travels.
Must have: a cute back pack for your sunscreen, sunglasses, hat, snacks and drinks.