Getting motivated - I'm taking a part-time BA course, working full time and going thru a divorce...

Recently I just gave up doing my assignments when I got a low grade. How can I get motivated to continue studying part-time, working full-time and handling a divorce (not acrimonious). There are days when I just want to sit in front of my computer and just laze around. I also have to re-organize my store-room and den. Made a “To-do” list but have hard time adhering to it. How do you get motivated?