It requires a peculiar and specific discipline in and of itself in order to let go of the minutiae. I speak from personal experience!
I seem to get stuck in minutiae quite often. But I have been consistent with the workout for 5 weeks now and my diet is improving. I am reading a lot on the topic right now and have plans I will try in the future but my 1st goal is to just get to 5-6 meals per day of unprocessed food. I used to eat around 2 meals per day with unhealthy snacks throughout the day. I am now eating 3 meals a day of unprocessed food and plan to add a 4th meal as a protein mix after the workout. As i adjust I will add the other meals, its just hard to keep it all unprocessed, I have a lot of old habits to break.