Chris Do's work was my introduction to this concept, perhaps you might find it equally helpful.
This is one of his lectures on value based pricing, but he has a number of them that are informative on the concept in different ways:
https://www.youtube.com/watch?v=ivKnj9ffcmE
> "I know how to cook, but if I'm cooking for myself, I'll probably be lazy"
> "How does one develop and maintain internal motivation?"
> "... Besides "passion" and "enthusiasm" ..."
Perhaps it's an unwarranted bias on my part, but I cringe whenever I hear 'passion' brought up as the answer in this context, for this reason: it seems to me there is a distinction between monkey and user, e.g. the hedonistic monkey that drives us towards the easiest dopamine hits and the user that can override the hollow desires and moves us in a direction of actual fulfillment. The user can be passionate and it won't make a lick of difference if you're still letting the monkey sit in the driver's seat.
Assuming this metaphor makes sense, how does one put the user more in control? In my experience becoming conscience of this push-pull -- daily, hourly -- makes the most difference. Then it is a matter of learning, training yourself, to become responsive to the user. During this process I've found it is important to focus on mentally rewarding yourself for improvements and not fall into continually chastising yourself for 'not doing enough,' etc.