Use a plunger on small, shallow dents
Pour hot water on the dented area if the panel is plastic
Use a hair dryer to heat the dent, then spray with compressed air
Apply dry ice to the dented area
Use a dent puller kit
Use hot glue tabs and a puller tool
Push the dent out gently from behind the panel if accessible
Tap the high spots down with a rubber mallet and a body hammer
Use a suction cup dent remover
Take the car to a paintless dent repair specialist