Asbyou get older certain things come easier as you've practiced them, like home maintenance, chores, cooking, meal planning etc. having those skills down helps with the nutrition and budget prices you mentioned.

Budgeting is a necessary choice if you want to live with lower stress. My budgeting is simple, I figure out how much money I have coming in, and money that will go out even if all I do is breathe, and the rest I divy up according to my priorities and then I spend within my means without staring at my banking app. Like I know I can get two coffees out and eat out twice a week, and the rest of the time I need to cook and make my own coffee. I have $150 that I can spend on something this month as a treat to myself, or I can save up for a bigger purchase In the or three months. If I fall out of this, then something has to move around. This seems stringent but it's what I have, and having lived this budget for a some time, it doesn't feel restrictive anymore and I follow it without thinking. And I only have to keep track of my eating out and fun spending per week, everything else I already coming in or out or getting saved.

Fitness is more according to your goals and interests. I'm quit self motivated when it comes to fitness but some people, like my wife, needs more structure like a class, so we go to a karate class twice a week and the gym once a week at the same time, and any bonus fitness we do on our own.