It can really be that simple sometimes. I remember very clearly the first time I was able to do it. I had left a credit card on the photocopier at work after photocopying it and my boss yelled at me as it fell in (somehow? ) and temporarily jammed the copier.
Usually after something like that we would switch and a child part who was very self hating would come out, but I was able to tell her it was okay - it had been a simple mistake and the boss lady was overreacting - maybe having a bad day or something - and it was fine. I would make sure it didn't happen again.
And then instead of switching and getting stuck in self-destructive coping behaviors we just carried on about our day. It was truly eye opening, and the auspicious beginning of a different way of life.