You know better than to vow, after chomping your way through your fifth slice of chocolate cake, that starting tomorrow you're only ever going to eat salad and you're going to run 10 miles before breakfast every single day, forever. After all, nobody could keep that up, right? Be realistic! But plenty of you are setting your sights on productivity goals that are just as unrealistic. Come for a chat with your imperfectionist friend and have some sense lovingly knocked into you.