I usually underestimate the time that it will take to do anything. I'll start a home improvement project thinking that it'll be done in a weekend and it will wind up taking two weeks. I'll give myself a two hour window to edit the photographs from a portrait session and five accumulated hours later I'll finally finish the last one. I'll even leave the house ten minutes before an appointment just to find myself sitting at a stoplight when the clock ticks over to the time that I'm supposed to already be there.I do this all the time. It's especially not easy to predetermine the length of time needed to finish a home improvement project. And...