"If you do what you've always done, you're going to get what you always got."
Or, as one pointed out recently,
Any other versions?"If you think what you've always thought, you're going to see what you've always seen."
"If you do what you've always done, you're going to get what you always got."
Any other versions?"If you think what you've always thought, you're going to see what you've always seen."