Now I feel a bit like writing some tool to automatically follow your posts (easy with existing HN replies) do a semantic analysis on them to determine when you will make that misstake again and give some alert (the hard/expensive part).
Maybe the alert could be four beeps on your terminal
And then I write a blog post about it.
But maybe I find something more novel.
(And I have, but maybe I can actually use it for the task above)