What Don Firth says goes for me too.

When in doubt, I may leave it out, or post it the next morning, by which time the discussion has often died away. (My carefully phrased post often remains the last one on a thread. Then I wonder if anyone actually read it, or if they were so tired of the topic they didn't open the thread again. Or maybe I'm so boring that everyone prefers to let the thread die after I chime in.)

When I do post in haste, like today, I very often repent at leisure.

Two or three times, when posting an amendment wouldn't do (e.g. with a confusing error I didn't notice until after five other posters had commented, or forgetting to sign my name on a sympathy thread) I PM'd to request a correction, the way Katlaughing suggested, and kindly MudElves answered my prayers.