Habits are often deeply entrenched and if you think about ‘breaking’ them, you’re already psychologically setting yourself up for a fight. It makes them sound hard, something to battle against.
Whilst habits are tough to change, how you approach this will make a difference. Look at why you have that habit, and try to unravel it. Try changing it bit by bit, to alter the neural pathways in your brain.
Samuel Johnson once said; “The chains of habit are too weak to be felt until they are too strong to be broken.” So maybe don’t try breaking them. Wriggle around in them a bit, and maybe they’ll fall away more easily.