By overcoming the concept of "lazyness". Society makes us believe that lazyness is just "not wanting to do something". But that is scientifically proven to be factually wrong. Procrastination is rather a result of our doubts and fears regarding our invidual performance and escapism with respect to the negative feelings we accumulated towards a specific task (even if we don't realize that!). We can feel fine until we discover the mountain of negative feelings we have pushed far far away in a corner and forgotten about. People who are functioning and very seasoned procrastinators don't even realize they are doing it.

If you realize that and manage to develop some empathy for yourself, you can overcome procrastination quite permanently. It is not a weakness to be fearful or have doubts (and in extension to be "lazy"), but a very human aspect of our nature and everybody. It is very very normal to be fearful of failing. But we have to do it anyway all the while telling us that it is ok to be a little anxious and that everybody else has the same feelings unless they are seasoned veterans in a specific topic. And it has been proven time and time again that the strongest and most successful human beings are the ones who accept this.

All other answer (i.e. "breaking down the problems") just combat the symptoms, not the problem itself.