Have a “home base” location during production. When you’re filming, much time is lost to loading in and wrapping out. When you need to shoot 5, 6, 7, or even 8 (yikes!) pages a day, you will rue the time your crew spends lugging c-stands up a four story walk-up. Write one primary location into the script. Somewhere you can shoot (for free) for perhaps half of your shoot days.