1) Use Heartmath loads - because that will teach you to access your parasympathetic nervous system on purpose. If you have stress / fight or flight, your brain is often optimised for rapid situational action. Its only when you can feel safe and uncertain that you can zoom out from your present perceptions and explore other ways of seeing the World.
2) Then you need to get good at measuring, and anchor your rulers in other systems. Any time you can't predict something before it happens, your model has some issues.
3) Read more, faster - e.g. use RSVP method to read 4+ books a week.
4) Surround yourself with people who have enough contrast regarding what you think is true that they can point out stuff worth learning
Focusing on a target delivery date instead of software quality. "We ship sh*t on schedule!". Watch out when managers' bonuses are based on hitting a ship date and not based on first year sales.
If you start with the Socratic assumption that you are entirely ignorant and really don't know anything, you're much more likely to notice "new" unknowns.
As a semi-tangent, if you live your life without expectations you will never be surprised by your own ignorance.