If your New Years resolutions included ‘start going to the gym’, I’d suggest you instead take the cost of two month’s membership and pick up a kettlebell (along with an instructional DVD). Small enough to wedge away in even the tiniest New York studio, they give a remarkably effective strength and cardio workout in ten or fifteen minutes – less than the time it probably takes for you to get to the gym, much less start exercising.

And, for those of you who’ve been working out (more or less) consistently for the past year, head over to CrossFit and start following their Workout of the Day. Usually under a half hour in length, it will still convince you quickly that you’re nowhere near as fit as you thought.