What 13 hours can do

I have spent 16 hours of the past 24 hours asleep, which comes out to 2/3's of a day.

But at least my headache is mostly gone, my throat doesn't hurt, and my sniffles may just be attributed to allergies.

One of these days, when I'm not working a morning job, I need to do one of those sleep-as-long-as-you-can-for-a-whole-week exercises.

Now the question is: do I go back to sleep (which sounds quite lovely even though I just woke up two hours ago), or get some work done?