While my schedule is nowhere as complex as that of my friends, I think it's always nice to have a set routine. Here's my current weekly schedule.

Day	Free Time
Monday	1PM-3PM, 5PM-7PM, after 9PM
Tuesday	up to 6PM, after 10PM
Wednesday	1PM-3PM, 5PM-7PM, after 9PM
Thursday	Evenings
Friday	Evenings
Saturday	Evenings / All day*
Sunday	All day / Evenings*

* I choose to work either Sunday or Saturday. If working Saturday, I'll be free all day Sunday, and vice versa.