Name something that you do not do but should be told you ought...
Nada, I am already told enough, more than I can handle.
Name something that you do not do but wish you would be told you ought...
I wish more people would just tell me to relax and have some fun (people with arguments in favor of doing so).
Name something that you do not do but should do...
Existential risk mitigation. I don't do it because of uncertainty and psychological distress caused by the fear of having no more time to do what I would like to do based on naive introspection. And I am too selfish to give away large amounts of money that I fear I might need for my self at some point
Name something that you do not do but wish you did...
Be more focused on improving my education. I am too distracted by all the shiny and interesting things out there, by problems I can't solve and real life needs.
Name something that you do not do but are told you ought...
There are many irrational examples here. I am told not to care so much about my health and actually have some fun by drinking lots of alcohol. I don't drink alcohol because of health concerns but also because I simply don't like it.
After talking to jsalvatier offline for a bit about the issue of wanting to do AI research, but being afraid to fail, I've came to realization that I haven't fully analyzed why I am afraid of it. I'll need to take more time to break it down, but my first guess is simply lost time. But it's very likely that if I try to do the research, I'll realize really fast if I am at all capable of doing it, so the time wasted would be a year or two, which is not too bad IMO.
You said you are interested in existential-risk reduction. I don't know if you mean specifically...
An exercise:
Name something that you do not do but should/wish you did/are told you ought, or that you do less than is normally recommended. (For instance, "exercise" or "eat vegetables".)
Make an exhaustive list of your sufficient conditions for avoiding this thing. (If you suspect that your list may be non-exhaustive, mention that in your comment.)
Precommit that: If someone comes up with a way to do the thing which doesn't have any of your listed problems, you will at least try it. It counts if you come up with this response yourself upon making your list.
(Based on: Is That Your True Rejection?)
Edit to add: Kindly stick to the spirit of the exercise; if you have no advice in line with the exercise, this is not the place to offer it. Do not drift into confrontational or abusive demands that people adjust their restrictions to suit your cached suggestion, and do not offer unsolicited other-optimizing.
To alleviate crowding, Armok_GoB has created a second thread for this challenge.