The problem with New Year's resolutions - and resolutions to 'get in better shape' in general, which are very amorphous - is that people try to adopt too many behavioral changes at once. It doesn't work. I don't care if you're a world-class CEO - you'll quit.
There is no essential difference between the material of comedy and tragedy. All depends on the point of view of the dramatist, which, by clever emphasis, he tries to make the point of view of his audience.