Additionally, working (and therefore staying up) late can be out of your control. If you have a job where you have "fire drills" with some frequency then your

Additionally, working (and therefore staying up) late can be out of your control. If you have a job where you have "fire drills" with some frequency then your sleep early/wake up early schedule is going to be hard to maintain. However, if you have a sleep late/wake up late schedule then a last minute fire drill might cut into dinner, social life, etc... but its less likely to cut into sleep.