Quick draw
Following posts about aiding the creative process. My old life-drawing teacher made an exercise, whereby the model moved to a new position every 20 seconds. The students had to produce a new image for each pose. She went on to say that if you saw someone jump off a ten story building, the truly confident artist would have drawn them before they hit the ground.
I suggest an excercise , whether artist or writer, sit in a cafe or restaurant where you can see people walking past through the window. Sketch, or write a description phrase, for the next person you see each time you look up from the last - as many people as possible over ten minutes. You should end up with a notebook full of material. An excercise in beating hesitancy and building confidence.