There are many ways you can change your sleep schedule. Your body needs between 7 and 9 hours of sleep each day. Calculate how many hours of sleep you need and what the ideal sleep and wake time is for you. Once you know your new bedtime, you can start changing your schedule. Try changing your schedule gradually. Go to bed 15 minutes earlier every few days until you reach your ideal bedtime. Avoid snacking, exercising, getting too much light, or eating a large meal before bed, as these can all affect your sleep.