Answer: I close my eyes and type.
If I get bogged down with word choice, it is easier to visualize the scene with my eyes closed. I picture my character and what he/she sees, put my fingers on the home keys, and type. This way the typos, word choice, and the way that the sentences look on the page do not get stop my train of thought. Or rather, my character's train of thought.
The world around us can distract us from our imagination, but our imagination will lead to better realization of the world around us.
In short, just write. None of it may be usuable in your manuscript, but then again, you may find yourself comparing the fostercare system to ungathered seed pods.
