You are not creative unless you are creating things. You are not a filmmaker if you don't make films.
You have to believe that the work you are doing is part of something bigger. That it has the power to radically transform the world. Whatever you are making may be more important than what think of it.
Creativity and uncertainty are twins. They go everywhere together.
You have to try, every single day to create something that is worthy of people's time. That's it.
Creativity might be the only thing that cannot be automated.
Be brave enough to be bad at something new.