Changing habits have become an insurmountable task. In my 20s and early 30s I'd go on diets, start going to the gym, learn a new language, work on side projects. Since having a child I'm just struggling getting enough sleep and keeping the apartment clean, there's no energy left for reinventing myself or changing habits... It also becomes harder and harder to start something because from experience I know I'll eventually fall off the wagon. Hopefully it gets better once kids are more self sufficient...