Portokalopita (Greek Orange Phyllo Cake)
Ensure that you get the wet yogurt wet mixture evenly distributed throughout the phyllo sheets; if you don't, you may end up with some doughy spots throughout the cake. To make this easier to avoid, be sure to dry the shredded phyllo sufficiently before adding the wet mixture.
When pouring the syrup over the cake, ensure you pour cool syrup over the hot cake (not hot syrup over hot cake). You can use a ladle to slowly pour it over, letting it soak in between each addition.