Make some habits, which include:

- Exercise regularly (doesn't mean hours a day in the gym, just make it a regular habit)

- Don't eat so much junk, don't drink so much

- Have a regular sleep schedule and stick to it.

- don't sacrifice for your work, unless your work is also part of your recreation.

- conversely do prioritize your relationships

- max out your retirement contributions as best you can

Age: 50s; some of above are what I did and some are what I wish I had done.