One of my worst habits is staying up really late until the sun comes up, or the opposite, falling asleep while doing homework. When this happens, I end up leaving the lights on the entire night (since I’m the night owl of the family) and I forget to put in my night contacts so I wake up the next morning in a horrible, blurry mood. It is a habit I am working to fix so I am not contributing so much to light pollution and wasting so much energy.