I -wish- I could see things ahead of time. I'm in awe and envy of those who can. Everything for me is painstaking. The words come naturally, but painting the pictures . . . gah, that's hard stuff for me.
Things that help:
Drawing on my theater background and limited martial arts training to visualize blocking and combat.
Really -looking- at the world around to help visualize scenery, and really -listening- to the world to help tune in the audio. New York City is just horns . . . or is it? It's the hiss of tires, newspaper rustling in the air as it whips past, the low hum of voices and the calls of the handbag vendors, the whirr of the bus engine starting up . . . all stuff that has analogs in any time or space. The city is all big rectangles . . . or is it? The sidewalks in their different colors, the concrete faces and fluted decorations on the corners, the faded green overpass crossing 32nd street . . . the hundred wigs in the window of the wig store, the summer puddles in front of the suitcase store where the old Chinese guy strews water and brushes the sidewalk clean with a dirty, broken straw broom . . .
Not to mention smells (good grief, the smells, both good and bad...) and the claws of the wind that rips the breath from your lungs as you turn from 32nd onto 7th . . .
I can't visualize for crap, no. If you're like me, I feel bad for you

. But you -can- compensate by being observant, and by mapping what you experience into some analog in your writing.