It commonly takes anywhere from two weeks to three months of repeating an activity before it becomes habit. The more dislike you have for the activity, the longer it will take. The other advantage of doing an activity daily is that you won't get as behind in that area, relieving you of some of the guilt and overwhelming feeling of lack of completion or success. Ask to review the child's work when it is completed. If the room still looks messy, as the child to perform three more tasks.
Praise is also helpful for a job well done.
Breaking down large tasks into subtasks can make it easier for the child to complete the work. A list of the morning routine can be placed in the bathroom, bedroom and kitchen with the various tasks to be completed in order. A place next to each task where the child can place a check mark is often helpful. That way there should hopefully be no tasks left undone before leaving the house. The 5 to 7 check boxes can be placed next to each item so that each sheet can last for an entire week.