“Everything turns on your assumptions about it, and that’s on you. You can pluck out the hasty judgement at will, and like steering a ship around a point, you will find calm seas, fair weather and a safe port.” Marcus Aurelius, Meditations.
Take a step back and an extra second or two to think about why you think or believe what you do. Challenge your own evidence. Make it a regular event – not so regular that you find yourself unable to make a decision when one is needed – frequent enough to reassure yourself that you are looking at your life with the clearest perspective possible.