This article out of Script Magazine by Pen Densham offers practical advice for getting past that wall standing between you and your next great scene:
Harnessing your creativity can be both deliciously mysterious and overwhelmingly frustrating. It often will NOT run on rails.
Whether you react to a blockage by cursing and kicking a hole in the landlord’s wall or retreating to a dark cupboard with a pint of Dreyer’s best frozen sugar bomb, remember …
Have faith that ideas are going to come to you.
I often run into an apparent dead-end. Especially if I am writing a new piece without all my elements and structure figured out. One technique I have learned is to commit the problem to my subconscious and move on to another area. Even quit and take a break altogether. The phrase “sleep on it” is more than just folk wisdom – it works!
No time to sleep, you have to deliver?
Who says we have to write in a straight line?
In World War II, the U.S. forces chose a unique strategy to fight the Japanese who had control of hundreds of Pacific islands, thus creating a set of threatening stepping stones towards America. Instead of bogging down, fighting a linear battle along the chain, the American forces chose a creative solution: a route across the Pacific that skipped any islands they didn’t feel like fighting! They leap-frogged problems, attacking where it suited them and coming back for cleanup when they were good and ready.
Whenever I hit an empty hole in my writing, I try to think of it as just an undiscovered area. Not that it is the end. I do not use myself up in a frontal assault, but change direction, grab a cup of tea, or take a walk and let my brain hop around and give me ideas and solutions in an uncritical, patchwork quilt approach. Ideas from other parts of a story can ricochet around and solve several issues at once.