How to Make the Most of Your Last Day

I usually write at home, I haven't got an office yet. It's a smallish room with a kind of, what would you call it, a pitched roof. About 80% of the work that I do is done up here. My schedule was similar to I guess how moderns was in there,. We tend to go late, well, do I have a cut off time? If I've gone past midnight it's because I want to meet a deadline or something that's happened during the day that's delayed me.