I overcame procrastination / lack of motivation when I read this article[1], effectively summarizing the above through a study of the study habits of successful (non-procrastinating) children. Now, when I procrastinate, I ask myself, what is my selfish motivation for completing this, and do I believe I will be successful? If I don't have a self-interest, I create one. If I don't believe I will be successful, I find a way to ensure success or sufficiently increase my confidence in my ability to achieve success.
[1] https://www.psychologytoday.com/blog/dont-delay/201601/ill-d...