I've just completed Day 1 Of The Duty To Sell Challenge and here are the 3 things I've learned:
Changing my identity is more important that just doing actions because these actions will not last long.
It is very important to understand why I do things rather than just doing things because someone said it.
If I can understand why I do certain things, I will be able to get a deeper understanding of it that will allow me to create my own questions in a sales conversation.