if you were wondering if the time was right to have your third child, here is something to think about. (it made me laugh)
if you are really bored, you could draft a Christmas card at shutterfly (although who's going to admit to it? ;)
if you have a million random thoughts running around in your head, you could write a novel with a million different characters, some lucid some not, and call yourself sane.
if you are too lazy to do any of the above, read your stack of magazines and plan more nothing to do for the stat holiday. it will be relaxing, i promise.