die at the exact moment and time when I choose

No, this doesn’t mean suicide. It means letting my heart stop beating purely by mind control. I can lower my heart rate right now by concentration, but not below about 60 beats per minute. I don’t dare go farther.

Looking at my other goal about dying, I want to be able to say after I’ve lived 119 years “I think I’ve had my fun” and just let my body die when I tell it to. And hey, maybe after 119 years I’ll decide I want more and decide to let myself die at 150 instead.