@Surasanji I would wish to live in an optimal level of comfort for the remainder of my life, with everything that comes with it, without reducing the number of people and causes I care about.
In my selfishness, I would prevent any (mental) health issues, financial setbacks, deaths and impending doom scenarios for me or the people/causes I care about.
We might even never die unless I feel like it being the right time and be completely comfortable with that idea. And for me, that would be in that immutable, set-in-stone, one year. But I would be happy at least.