One of the nice things about my grad student schedule is that I can stay home on days when I don't have class. Mondays and Thursdays are my big days: class and meetings from 10 til 4. I know that doesn't sound like a lot, but it's all I can handle right now.
Yesterday, I walked to campus, attended my meetings, and walked back. I got home around 5:30 and collapsed on the couch. By 9:30, I was so tired I was practically delirious, so I went to bed and slept until 10 this morning.
I have never been this tired in my life, not even after soccer hell week in high school.