What affects the different types of luck in Animal Crossing New Leaf?
If luck isn't random each day, what affects my character's different types of luck? Can I turn a type of luck around in a given day?
Luck is largely affected by Feng Shui and Lucky items. Thonky has a detailed article on the matter.
Taking Katrina's suggestion is also believed to improve luck but I don't have any firsthand knowledge of how well that works.