Output follows input. The mind processes what it receives. Feed it quality and it produces quality. Feed it noise and it produces noise.
This applies to information, relationships, and environment. The books you read shape your thinking. The people you spend time with influence your behavior. The spaces you inhabit affect your mood.
Audit your inputs. What are you consuming daily? Does it serve your goals? Does it improve your thinking? The easiest way to change your output is to change your input.
What input could you upgrade today?