I like the idea of life lengthening, especially with life quality, but I think we all have to get the idea that at some point we are going to die, no matter science developments.
So many people have followed religions because they provide ease before the fear of death.
Nowadays wealthy people are spending their money in science projects because they fear dying as well.
But atomic bombs, cosmic cataclysms and the like will always be there.
So, I welcome whatever developments can bring us more life and more quality but I always have in mind that at some point this is going to end.
1. 95% raw fruits + raw vegetables is a major go. 5% cook food which is the meat.
2. Stay away from wheat(gluten), diary, artificial sugars, most of seeds, starch, processed foods made by humans or products made by humans like cigarettes and vaccines.
3. Get sunshine(vitamin D) everyday at least 15 minutes.
4. Don't let stress affect you.
5. Exercise 20-30 minutes everyday.
Optional: Find your passions.
That's the best advices I can give to you, if there are others I would like to hear as well.
That has nothing to do with what OP is talking about. That will make you live 80-90 years at most, and even if you do that, you can die young.