Creative Flow~
To master the flow of writing, learn to master overthinking what you write. Write everything down, anything that comes to your mind as it applies to your subject, character, landscape, etc. Concentrate on writing using all five senses. What do you smell, taste, touch, hear and see? When you read through your work and then re-write it, which is inevitable, it’s easier to cut the excess off than add in.
Enjoy!