Here's an idea worth mulling about. The author proposes that on each 31st (7 total for the year).. you use that day as a "catch up" day for whatever it is you need to get caught up on. Your paperwork, time with your kids, take the cat to the vet.. etc. The idea is, who is going to miss that one day anyhow, and think of all the stuff you could get done.
Check it out: National Catch Up Day