Me Time

Whenever I happen to get both kids asleep at the same time and/or find myself at home alone (which is extremely rare!!) I often am torn between what to do with that time. Should I clean the house-since it desperately needs to be cleaned. Do I use that time to nap-since I rarely get more than 3 hours of uninterrupted sleep myself. Or do I use that for "me" time-to scrapbook, play on the computer, learn to sew or to attempt to complete other various tasks?? so much to do and so little time!!!!