I do find this thread to be very useful because the confusion and fear that people go through with market downturns can be very educational. I am reminded why I need a plan, and why it's important for me not to deviate from it. An opportunity for some self reflection.
I have been a Boglehead for less than a year. Last year I wrote our IPS, simplified to a 3-fund and chose our AA after lots of thought. Before that, I felt so stressed out by market blips (ups and downs). I felt pulled in all directions by all the predictions and analysis. Now my plan tells me exactly what I should be doing (which most of the time is nothing), and where the money should be going. There is nothing else to act on, but lots of opportunities to continue learning.