A similar but different method is calculating your "perfect life probability" (from Howard).
Let A be a "perfect" life in terms of health and wealth. Say $2M per year, living to 120 years and being a perfectly healthy 120 year old when you instantly and painlessly die.
Let B be your current life.
Let C be instant, painless death right now.
What probability of A versus C makes you indifferent between that deal and B for sure? That is your "perfect life probability" or "PLP." This is a numerical answer to the question "How are you doing today?" For example, mine is 93% right now, as I would be indifferent between B for sure and a deal with a 93% chance of A and 7% chance of C.
Note that almost anything that happens to you on any particular day would not change your PLP that much. Specifically, adding a small risk to your life certainly won't make that much of a difference.
(I'm not sure how immortality or other extreme versions of "perfect health" would change this story.).
What probability of A versus C makes you indifferent between that deal and B for sure?
This is an interesting thought experiment. I submit that for many men, the probability is quite small, say on the order of 15% or 25%, whereas for most women it is 90-95%.
Edited: I originally wrote "for women it approaches unity".
... Oh, no! I've been shot!
— C3PO
A strange sort of paralysis can occur when risk-averse people (like me) decide that we're going to play it safe. We imagine the worst thing that could happen if we go ahead with our slightly risky plan, and this stops us from carrying it out.
One possible way of overcoming such paralysis is to remind yourself just how much danger you're actually in.
Humanity could be mutilated by nuclear war, biotechnology disasters, societal meltdown, environmental collapse, oppressive governments, disagreeable AI, or other horrors. On an individual level, anybody's life could turn sour for more mundane reasons, from disease to bereavement to divorce to unemployment to depression. The terrifying scenarios depend on your values, and differ from person to person. Those here who hope to live forever may die of old age, and then cryonics turns out not to work.
There must be some number X which is the probability of Really Bad Things happening to you. X is probably not a tiny figure, but instead significantly above zero, which encourages you to go ahead with whatever slightly risky plan you were contemplating, as long as it only nudges X upwards a little.
Admittedly, this tactic seems like a cheap hack that relies on an error in human reasoning - is nudging your danger level from .2 to .201 actually more acceptable than nudging it from 0 to .001? Perhaps not. Needless to say, a real rationalist ought to ignore all this and take the action with the highest expected value.