Don't Make Me Do Stuff

It's funny, and by funny I mean incredibly weird and irritating, how I can only seem to make myself do anything when I feel like I have no choice. On the days when I have tons of free time, I end up wasting my whole day and accomplishing nothing. I honestly get twice as much done before I leave for work than I get done on an entire day off simply because I know I have to get it done before I leave. What the fuck is my problem?