It's amazing how my aching back is getting better (My know-how)

I think it was Professor Jung Sun-geun. After hearing him say that you need to avoid bad postures to heal your back, I stopped doing all the things that are bad for it.
But it turns out there are way more of those postures than I thought.
I avoid bending over when washing my face or shampooing my hair,
and I avoid slouching when sitting in a chair (which presses on the discs).
On the contrary, I make sure to stretch my spine backward from time to time, and the pain is gradually subsiding.