Old Man Al
You can do a lot not only to prolong your life, but also to prolong the active part of it.
Everyone knows what to do, exercise, minimize stress, eat a healthy diet, clean environment.
This doesn't have to be difficult and you don't have to force yourself.
Find a sport you enjoy, like cycling for example or soccer, tennis, jogging...
Healthy food can be delicious too, so delicious that you never want to go back to junk food.
Eliminate the main sources of stress: news, people that make you unhappy, study psychology to accept the world as it is.
It is difficult to achieve a clean environment in the city, so move out of the city...
The best part about this is that not only will it increase your chances of making it to the end of this game, but the quality of your life and enjoyment of it will greatly improve.