Answer: The question is incorrect because this happens unexpectedly. What works is the sum of all the different efforts, some of which you do not even suspect are there. Only later, when you sort out the “accumulated collection” do you start to understand that everything you went through was necessary for you to attain what you just attained.
However, as long as the end result of all the efforts is not revealed to you, you do not know how much is left. That is why it is impossible to say that some specific effort brought you to completion.
Question: What was special about your efforts?
Answer: I think nothing besides patience, persistence, and consistency (of course, with the background of worries and everything related to them). Baal HaSulam writes about this in the famous example in Item 133 of “Introduction to Talmud Eser Sefirot“: “And only the heroes among them, whose patience endured, defeated the guards and opened the gate. And they were instantly awarded seeing the King’s face….”
Who is a hero? It’s a person who had enough patience, who did everything possible not to veer off the path.
From the 1st part of the Daily Kabbalah Lesson 1/9/11, Writings of Rabash