More pfaffing around this morning: guess who forgot the washing up liquid ... and I had an urgent birthday card to get in the post, too. The persistent sticky patch on the kitchen floor has been traced back to long-forgotten fruit juice cartons leaking from the bottom (so not immediately obvious). I kept wiping up and it kept coming back ... and I didn't know what it was so was not a happy bunny. I obviously intended mixing pineapple and grapefruit juice for breakfast, but that got overtaken by medication :( and the juice left behind.
I have done some study and am now on to Luther, the aim being to revise those familiar topics (and as they are familiar I can see the broader picture, which adds perspective I didn't have before) so that once term starts I can put my energy into the bits that need it. (A persistent little voice repeats "metaphysics" at regular intervals, and that topic could keep me occupied for 12 months on its own!)
I have come to the conclusion you have to do the study first and everthing else round it: as an adult student you tend to think your duty is to other things first. If you do that the study gets squeezed out: it needs a decent chunk of time in one go, or you lose the thread of the argument. Other things (with the possible exception of cooking stew) are not likely to take as long and can be done for a break.