Jon Acuff is the New York Times best-selling author of several books, including Start and Finish. A master researcher on goal setting, I asked him what the most difficult day for people who set goals is. Most assume it’s the first day when they get started, or possibly the last few days as they push to finish. When I asked Jon (Acuff 2017), he said: “Simple—Day two is the hardest day and where we see the most drop off.”