Asked about whether you need to know the ending of your novel or screenplay before writing your beginning, I consulted J.K Rowling, Toni Morrison, John Irving and Stephen King before I was reminded of what Ed O'Neill told me about cage fighting in an interview I did with him for the documentary I Am Bruce Lee. Who knew cage fighting and writing were similar?
Little known fact: Ed O'Neill had a black in jiu-jitsu. Don't mess with Ed.
There are so many tips and techniques and ideas around writing. But if you don't feel confident, it's hard to put that pen to page. Believe in yourself. Confidence is essential for flow. And we all deserve creative flow.