Take Responsibility for Everything
By taking responsibility for everything that you can in your world, it implies that you have control. When you blame external circumstances, or other people, you are in many ways pushing away responsibility and your control of the situation.
This mindset, while it sounds like a heavy burden, in fact gives you more freedom. It gives you control over your circumstances, and means that you can do something about a situation, rather than complaining.
However, be wary of taking this too far. Avoid the systemic or structural factors that are actually out of your control, and focus only on what you can control.