Read and bathe. I have the most incredibly superb bath tub in my ensuite that (luckily for the conservationists) I almost never use because my idea of having a bath is not the same as my DDs' ideas! So, when I have a truly free day that is not otherwise devoted to cleaning, washing, ironing and grocery shopping I turn on the ipod, pour myself a long icy drink (these days non-alcoholic but hey, good enough), climb in the bath, fill it with water and bubbles and read until I turn into a prune. Poor DH who works from home used to think it was my suggestion of a bit of a different variation to the nooner - he soon got the message when I shooed him away and told him that in fact yes, I WAS serious when I told him I didn't want company!!

Enjoy your child free time. As much as I adore my children I LOVE a bit of down time to myself.