Making plans and doing the sums

I have been doing some sums this morning. If I am going on official holidays on December 15th this means I have about three weeks to get through my book edits once more if I am to holiday without it hanging over my head. So if I have about three hundred pages still to get through, and work on the premise that I can find time for it five days out of seven, then I need to do 30 pages or so a day. That doesn't sound like much. Does it? Actually, 30 times 15 seems to be 450 (according to my trusty calculator). So what I have really done is factored the usual procastinating time, as well as unforeseen events such as getting up in the morning and thinking, "I don't feel like looking at that book draft today". And the fact that when I'm at work I might actually have to do the job they are paying me for (which sadly is not research...don't get me ranting on this).