So, I wound up hearing Dorothy Bass talk 3 times in the last 24 hours, but that was okay, because she's a wise and clear speaker, and her ideas about sabbath and time are deliciously counter-cultural and probably neccesary. I don't know if I have much to add to what she says, but here's what I got from her:
We are so interested in investing our own importance with how much we do, that we keep working and working and never take a rest. But, indeed, sabbath-keeping is one of the ten commandments, and we are not nearly as nonchalant about our disregard of the other nine.
So, her suggestions for sabbath-keeping are reasonable and flexible. Take a whole day, whenever that day is, and do things that refresh you. Don't do your normal work.
I've done sort of a truncated version of this for the past semester plus a bit. I don't do homework on sunday, which makes me availible to participate in whatever liturgical or church community activities I would like to. This has been a huge blessing, and it has kept me from my constant "I should really be doing something productive right now" mindset. But, I'll admit, I let it slide as I put off non-homework tasks (laundry, grocery shopping, grad school apps) to sunday when I wouldn't do homework. I think I'm gonna try and be better about that this semester.
Also, its a good reminder that I am not so crucial that the world won't continue without my contributions. Which I think those of us inclined toward arrogance need to be reminded of rather frequently.