Whenever I would come home from a long day at work or school, I was so tired the only things I could find energy to do were mindless life-negating nonsense — television, Netflix, Reddit, Facebook, whatever.
As a graduate student, the above sentence stings because it more than true. After work in the morning and class at night, I mentally "clock-out" and lack the energy to do anything productive.
Part of my daily routine is to meditate for at least 20 minutes in the morning right after I wake up, and at night before I go to sleep. The daily action of clearing my mind and reflecting on my actions of the past day has helped alleviate the lethargy I used to feel after work and class.