There are a ton of things I really enjoy doing: running, boxing, playing music, writing, drawing... however, I always struggle to get started. It always feels like a chore and I'm baffled as to why. I should be excited about initiating any of those activities, but I'm not! The moment they enter a to-do list, I know they also enter the realm of procrastination and avoidance. It's weird.
As I grow older and more experience, I realize "it's all in the mind". If you have the right mindset towards the activity you want to do, you have 80%+ of the job done.
Using running as an example, I went from running a couple days per week to running every day. Why? Simply put, a mentality shift. Before, I would think about it as "I should run at least 30 mins, 3 days per week". Now, I think about it as: "Let's move a bit, go to that nice canal by the river". In a nutshell... I moved my mindset from "I must be disciplined" to "let's play", pretty much as the author states.