In a thread on Reddit about coping with the fear of death I suggestlearning to play Go and playing in tournaments (for the timed matches) as a way of getting used to managing a limited stock of time.

Robin Hanson ponders trying to stick to clear, simple methods of rationality in the hope of avoiding judgment and the biases inherent in the exercise of judgment. I comment that this has worked poorly for me and Go with the implication that it is likely to work poorly in real life because real life has even more of the nasty complication than Go.