Please choose the correct ending to complete the given sentence: Health: [header] How to adjust your sleep schedule [title] Determine your desired waking time. [step] If you're changing your sleep schedule so you can wake up early enough for work, for example, you probably want to wake up an hour or so before departure. [substeps] Consider all the variables when making your decision.

Ending1: What do your mornings look like? How much time do you usually need to get up, get ready, and get out the door? [title] Calculate your optimal sleeping time. [step] Most people require 6 to 8 hours of sleep every night, but the exact duration of necessary sleep differs from person to person. Ending2: For example, if you want to start working late in the morning and get up early later, you want to wake up a half hour before departure. If you'll be doing work and will be going to bed late, make sure your work and family life are positioned in a similar fashion. Ending3: Will your current bedtime affect your sleep schedule? Do you need to stay up later in the day to work on a certain assignment? [title] Consider your mood. [step] If you make the decision that you want to sleep later on in the day, then try to adjust it for later in the day. Ending4: If you have less than an hour to plan your day, take some time to figure out what problems you most wish to address. On the other hand, does your current schedule align with your new sleeping schedule? Is the extra sleep you're looking for helpful in preventing pregnancy? [title] Decide how many hours you want to sleep.

Answer format: ending1/ending2/ending3/ending4