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.