Someone assigned to call 911. A meeting place for everyone once they get out. Practice fire drills regularly using your escape plan. Keep matches and lighters out of the reach of children. Have a working fire extinguisher.
Smokers always use a proper ash tray.
For each pot or pan you use, have its lid out to cover it. Keep the cooking areas clear of combustibles. Turn pot and pan handles inward on the stove so they can't be bumped. Keep small children away from the cooking area while in use. Keep portable heaters and space heaters at least three feet away from anything that can burn.