One of the classic mistakes that many of us make is confusing the act of thinking about doing something with actually doing it.
We may like the idea of doing things in our heads but taking action on our ideas in the real world is usually much different than the pretty things we concoct in our minds.
The perfect intersection is thinking about what we want, creating the steps to get there, and executing without overthinking again. If we can do this, we can do anything.