Indeed, this is a standard cause of procrastination: the belief that our future selves will be more in the "mood" to do the work, while our current selves aren'

Indeed, this is a standard cause of procrastination: the belief that our future selves will be more in the "mood" to do the work, while our current selves aren't. Unfortunately, in the future we will still be our current selves. So, similarly, we give estimations based on this rosy picture of our future selves, who will somehow work the rest of the week in unbroken eight-hour stretches of concentration and flow.