Drink lots of water. Eat something with less carbs more protein and fat. Coffee obviously. Try to get a short legs up the wall meditation if you can or even just a quiet moment resting your eyes. I like to use a cold sheet mask but if you don’t have any rip a paper towel into a few pieces, soak them in water, put them in the freezer and then plaster them onto your face to cover most of it… feels soooo good