One of them was about building a habit. You find a small meaningless thing to do, it must have no purpose at all, and then you do it once every day for as long as it takes to become a habit, probably a month or two. E.g. you could fill a glass with water and throw it out.
I did the exercise (I would kneel for a few seconds when taking a bath) for a couple of months, and I think it worked for me. I've recently used the same tactic to build a useful habit.
Now building a new habit is not necessarily the same as changing an old habit.
I also found out that kneeling changed my perspective. I could think about a situation with some level of tension, kneel, and then my perspective on the same situation would be more humble and appreciative. YMMV.