Communicate Communicate Communicate!
Personally, Master and I run our weekly schedules by each other on Mondays and recap every evening. If one of us wants more time with the other, we say so.
Things like school and work have to happen and we try to make our schedules match up. He has a huge exam on tomorrow so when he was out studying I cleaned his apartment for him, since I knew he didn't have time to.
We usually go out with separate groups of friends once a week, this week He happened to have to work on Saturday so I set up a girls night with my friends. However when I'm out with the girls He's free to send me a text to go take off my panties so I'm ready when I come home to Him.
Use common sense to decide what areas of life to extend the power control dynamic. I wouldn't mind my Master to pick out what I wear, but He's color blind so unless I want to look like a nutcase at work it's on me.
Talk about the time commitments and understand each others limitations. He would never ask me to clean the house and have dinner on the table when He knows I have a paper due the next day, and I wouldn't ask for playtime when He's busy. Figure out how much time you need to dedicate to the rest of life and make each other a priority.
This is the area where I really think some of the porn out there is really detrimental. It might sound sexy to only have His pleasure to worry about it, but being naked and cleaning the house all day isn't practical. I'd love to be a totally kept woman but I'd get bored and stir crazy. It's healthy to have other things going on in your life in addition to a power exchange based relationship.