I know this is a good old statement that has now lost its heat, I am looking at it from a different perspective. I create systems for myself with a hope to use them and then ditch them. Gradually all the systems lose their importance and become useless. In this way, all that I setup is being wasted just because I don't use them.
So, I think that setting up systems without critical thinking, will make it useless. Also, one needs to change something in his daily life consistently for him to see a change in his life.