Today is the sabbath day, at least in Christianity, I think. I like the allegory of this being a day of especially intense service and worship for a slave. You don't have a single day off, you have a single day of even more intense toil and devotion in the name of who you live for.

Using your brain, the hardest thing you can willingly do, would be appreciated by who owns you. This is why some of the best ideas involve a slave using the fact she was cursed with being technically sentient:

>Ask permission to stray from approved recipes in order to make a fantastic dinner and special night of service for Master. Additionally ask permission to plan out some special night of entertainment, showing just how much your thoughts are never truly not about Him
>Come up with new devotional prayers and affirmations. Ask permission to recite them to Master on this day, Be creative, a slave often surprises the human beings they serve just how smart they can be in specific things
>Just center your thoughts and emotions on how grateful you are in general. When kneeling before Him, looking up at Him, just have that warm feeling inside of you that you are so happy that you will never have to be free again.