I can confirm that 10 min is not enough. I also did meditation on and off for years, without much benefit. Then I went to a 10-day silent meditation course (t

I can confirm that 10 min is not enough. I also did meditation on and off for years, without much benefit. Then I went to a 10-day silent meditation course (the free Goenka one). On the third day it clicked. Now meditation is extremely useful for me. My life has improved a lot since then. I meditate about 4-5 one-hour sessions per month.