Selfie Central over here but my usual look for class :]
Usually, I just try to first conceal the bags under my eyes from not sleeping. I use Iman Cover Cream that I think is concealer - I use it like that at least - and then layer powder over it.
After, I usually use powder on my eyelids to help look more alert - I use it like eyeshadow. After, I will put a thin line of eyeliner on my top lids. For night, I will usually wing out the liner and make sure my brows look super good by tweezing and trimming the hair a little.
Last, I layer a little pink lip stain if I look pale or a swipe of nude pink lipstick with chapstick to make my lips look a little pink. For night, I will darken the lip stain or put on some lipstick. I am much better at lipstick than anything else so I usually go for more dramatic lips when I need to dress up my usual routine.
It's not much but enough to make me feel a little more polished for class and meetings. It also transitions well because I try not to put too much makeup on so that it does not melt or smear through the day.