This is the most popular resolution apparently. And clearly the most financially stupid. Its very natural (and actively encouraged) to go absolutely balls-out over the festive period when it comes to spooning fat, sugar and alcohol into your gob. So its quite understandable that people feel guilty enough to try and atone for it. But while spending the budget you usually save for booze on a gym membership instead may sound like a wise thing to do, it really isnt. The main crux of it is that theres exercise involved and for some this can be, frankly, horrifying. Though sprinting at full pelt on a treadmill for two minutes before falling off clutching your chest might seem like an achievement, it will never top sitting on a chair in front of the telly and not moving for three hours. Furthermore, doing the aforementioned treadmill attack just twice a year because you otherwise cant be bothered isnt going to get your sexy back no matter how much you flex in the mirror. When Youll Abandon It: guaranteed after the free trial month.