Sometimes, I use a method I call "layering." That is, I write in layers, concentrating on one thing at a time and going through the material several times with a single objective in mind. This method works for me. It might not work for you, but if it does, help yourself to the idea.
My usual practice is to write the first draft hot -- slash and burn straight through to the end of the story or scene -- not stopping for anything. Then I go back and layer in every image I can think of. I'm only working on images at this point. Show, show, show, show, show!
Then I go back again and cut prepositional phrases.
Then I go back again and rewrite the transitions, and end of scene hooks, to make sure I've not left out anything important. I have a one-track mind and sometimes that jumps the track. I can't think of everything all at once. Thank goodness, in writing, we don't have to.