Run the lid under hot water for 30 to 60 seconds
Tap the lid edge firmly with a spoon
Use a rubber grip pad or kitchen towel for better traction
Wear rubber gloves for extra grip
Twist the lid while holding the jar steady
Pry the lid edge slightly with a spoon or butter knife
Strike the lid top gently with the palm of your hand
Use a jar opener tool
Loosen the lid by tapping the sides of the jar
Ask someone else to try opening it with a better grip