Sleeping: 49 hrs/wk (generous)
Commuting: 17.5 hrs/wk (conservative)
Working: 48 hrs/wk
Lunch break @ work: 6 hrs/wk
TKD: 6 hrs/wk
School: 5 hrs/wk
Total accounted hours used per week: 131.5
For reference, there are 168 hours in a week. Therefore, I have 36.5 unaccounted hours—a little over 5 per day (although most of those hours are on Saturday and Sunday, where my only time constraints are TKD and work, respectively [and, of course commuting])—perhaps shoujo_mallet has something when she worries about my work/life balance.