I try to get an hour in after work, at least twice a week, on top of a 2-hour tutoring session once a week. Since I work 40 hours a week (sometimes more) it is really difficult to motivate myself Monday through Friday. Thus, my weekends is when I commit to 5-7 hours per day. With breaks of course. Additionally, whenever I have down time (like during my commute to and from work) I will study - the moments that were once useless are now small accomplishments!