Further Secrets of Adulthood:
We tend to over-estimate what we can do in a short time (say, an afternoon), and under-estimate what we can do over a longer time (a month) a little bit at a time. This realization led me to my very helpful resolution to Suffer for fifteen minutes. (I write about it a lot in Happier at Home, chapter on "Time.")
At the same time, it's true that some people prefer to do a lot packed into a short time, and others prefer to do less over a longer period. Are you a tortoise or a hare? I asked a friend, "Are you a tortoise or a hare? If a piece of work took 21 hours, would you rather work for 3 hours a day for 7 days, or 7 hours a day for 3 days?" She said, "I'd rather work for 2 days, for 10.5 hours!" A true hare.
How about you?