Wake up at your usual time… or only slightly later. Basically, don’t sleep all day and mess with your long-term sleep schedule.
Make a cup of good, strong coffee and an easy breakfast, i.e. nothing where you could easily burn or cut yourself. Protein is crucial, but avoid bacon and sausage because digestive systems freak out without sleep. I like avocado and melted cheese on toast.
If you don’t have a desk or a table because, say, you haven’t quite moved into your new apartment yet, at least make the bed. Don’t lie around in the sheets all day.
Also, put on real clothes as soon as possible. You must trick your body into thinking that it’s adequately prepared to act like a functional person today.
This also might require putting on makeup. Possibly with bright eyeliner, but definitely with under-eye concealer. If you can see yourself as bright-eyed and awake in the mirror, you can trick your brain is thinking you actually are awake. This tactic also helps avoid the shock of seeing your sleepless-zombie self in a mirror later today.
N.B. If you’re a dude, this step still applies.
Pack a bag. Don’t forget obvious things, like a cell phone or house key.
Head out door. Don’t forget shoes or pants.