When cleaning a house, starting from the top and working your way down is efficient. Begin with dusting and cleaning ceilings, light fixtures, and high shelves. Then move on to cleaning furniture and surfaces, and finally, clean the floors. This method ensures that any dust or debris that falls while cleaning higher areas will be picked up when you clean the floors. Additionally, it’s often recommended to start with the least dirty areas and move towards the more contaminated parts of the house, typically ending with the kitchen and bathrooms.