Why not go out today and have a fantastic day, eat whatever you want to and then have the resolve to start tomorrow. Get in plenty of the foods you're allowed on induction, plan your meals for the first few days and have some snacks on hand (cheese, olives, 100% burgers with mayo etc). Keep on telling yourself that you are going to give yourself that two week induction period and you will stick to it - what's 2 weeks out of a whole lifetime to make yourself feel GREAT!