Some of the best off-ice drills are great because they can be done almost anywhere and anytime. Like this balance and quick feet drill. All you need is a line on the floor to jump over. A straight line of tape on the floor would be the best way to do it, but there are really lines on the ground everywhere already - hardwood or tile floors, crack in the sidewalk, chak drawing on your driveway.
Check out a demonstartion video of the drill here. It's an easy drill too.