It is difficult for most artists to critique their own work.
Too involved with the process and the time spent, slight flaws get swept under the rug -- whether from ego or expedience. We can all improve our skills and there is something that can be built on or eliminated to make our work better; that's my point of view anyway.
Getting out a magnifying glass wasn't necessary in my case. A quick review of my films and my memories of making them tell the tale. When faced with four or five minutes of a story, weariness comes into play. Filler shots find there way into the tracks so that the film can be complete.
It happens fairly often. And yes, there is a better plan.
My current film in production is of the music video variety. The story is one of the songwriter, the footage follows the lyrics. Even though I have many shots in my head and files in the can, I have decided to build this film in sequence.
That isn't my norm, but I believe that in making that change AND paying attention -- I can leave out those empty filler shots. They can be replaced with quiet scenes that reflect the story.
So take a look at your work from a distanced perspective and see if you can discern the places that need improvement. Once you know what to fix, it is only a matter of attacking the problem from an alternate direction.