Pretty sure I need to reverse the advice on this one. Thanks for including the reminder to do so!
I use acausal control between my past and future selves. I have a manual password-generating algorithm based on the name and details of a website. Sometimes there are ambiguities (like whether to use the name of a site vs. the name of the platform, or whether to use the old name or the new name).Instead of making rules about these ambiguities, I just resolve them arbitrarily however I feel like it (not "randomly" though). Later, future me will almost always resolve that ambiguity in the same way!