Just remember when that cheeseburger is staring you in the face it's gonna make you feel like total SHIT now so there's no point in eating it! You're so clean your body's gonna react like it's poison (which it is).
If you plan good things around that too you look forward to it even more. I used to go out dancing all friday & sat night (sleep sat day...) and mostly just drank water -- the diet was not an issue on those days (well, except being sure that I actually ate). But Sunday afternoon ..... Capt & Diet Coke, reggae band on the beach & sunset BBQ on my deck. And it all still fit into my diet!