Ooops yes, you've got me there Colin! Well my chosen method is based on my Dad having been diagnosed with early Alzheimer's at 50. He was still able to climb mountains at 60 although he had a tendency to wander off. My immediate family might disagree but I don't see any symptoms in myself yet beyond what you would normally expect at nearly 59.
50 - yikes, that was young ...
My best mate just died at 59. It appears that he died in his sleep, which must be the best way of all? 59 is too young though.
Having nearly done it 2.5 years ago, I know that I definitely do *not* want to die terrified, feverish, breathless, in considerable discomfort, alone and with hours to think about what is happening to me!
I would like to go suddenly like my friend, only at 80-90, and before any further major health problems set in.