Some examples: eliminated social media, never watch, read or listen to live TV or news, don't own a smartphone, own very few personal possessions, have very few clothes, only own electronic books (with a couple of exceptions). Never read, watch or listen to anything with adverts. Moved from a large, expensive house into a rented cottage in the countryside (which had the side effect of freeing up enough money to live almost indefinitely without work, and absolutely until my pension kicks in), changed from permanent to contract-only work, reduced time worked dramatically, simplified diet, simplified health and fitness, and on and on...
The key turning point really is the understanding, actually the revelation, that debt-fuelled consumerism will never give you happiness and contentment. It's like a curtain was lifted and you say "Oh my God, I wasn't expecting THAT!". The trouble is most people don't believe it. Like the Matrix - you have to see it for yourself - one day it will happen.