For the last year or so, I’ve kept a book on hand called Mindfulness in Plain English. While it’s principally about meditation, there are several parts that I tend to apply to other things, as well.
Example:
Be gentle with yourself. Be kind to yourself. You may not be perfect, but you are all you’ve got to work with. The process of becoming who you will be begins first with the total acceptance of who you are.
Why might this be an important idea for a screenwriter to keep in mind?
You may not always get a scene exactly right on the first attempt, or make the deadlines you set for yourself, or nail that one cruicial line of dialogue right off the bat. It’s going to be difficult writing a solid script. It’s going to be difficult becoming the writer you want to be.
Don’t add to the challenges by deriding your efforts.
This Builds Character 