A client I had was spending days recovering from one day at work. She also told me she couldn't do this stuff at work. "Not at work," she said. With me, she experimented with different practices until we found the ones that worked for her, learned about what was going on in her body, and built up her time with the practices, bit by bit. Now she does them at work. She can have a hard day, or a normal day, and spends less time recovering, and she can pause and choose instead of react.
A young person came to me who would literally run away or lash out when things got too much. We tried different practices, simple ones, until we found what worked for them. Now they walk away instead, definitely more often than not!
None of this happened because of one big breakthrough. It's the small practices, done often enough that they were there when they were needed.