Plug a steam iron into a nearby outlet. Allow it to heat up.
Hold the steam iron 2 to 3 inches above the indented spot, without touching the carpet with the iron. Release steam from the iron into the carpet indentation.
Move the iron aside, and brush the smashed carpet fibers with your fingertips. Continue steaming and brushing the carpet until the fibers stand up.
Adjust a hair dryer to a warm setting, and hold the dryer over the indented spot, if the carpet contains acrylic or modacrylic fibers. Brush the carpet with your fingertips while using the hair dryer, until the smashed fibers stand up. This process takes approximately the same amount of time as using the steam iron.
Place an ice cube on top of each small, indented spot left from furniture legs. Allow the ice cubes to melt onto the spots. The carpet fibers should rise again.