Oh well, I might as well enjoy this weekend and start over on Monday. This kind of scenario is a perfect example of the diet mentality at work. A properly designed program makes sense, but expecting to stick to a structured eating and exercise plan for an extended period of time without ever deviating makes no sense at all. In fact, this is so unrealistic as to be a set-up for failure. If you begin to change your habits with the assumption that any deviation from your plan will ruin it, you might as well not even begin.
Life is full of unplanned obstacles, distractions, and temptations.
Your best approach is to prepare for them, keeping an open mind and maintaining a positive attitude. It's very important that you begin your healthier lifestyle with an understanding that there will be days when you will stray from healthy eating and exercising. Whatever the temptation or obstacle is, keep in mind that it's not wrong or bad to eat fattening foods once in a while or to miss a workout. Just remember to resume your healthy lifestyle. If you keep moving forward and you don't let guilt and discouragement stop your program all together, you'll eventually have improved eating and exercise habits.