A mindset of continuous improvement means you are regularly looking at what you're doing and trying to make improvements.

One mental model that will help you do this is the "Five Whys."

Anytime you are confronted with a problem you're trying to solve and you ask yourself, "why is this happening?" don't just stop there. Continue asking "why" until you get to a root cause.

Five is just an example and not a magic number. Sometimes you need to ask three times and others seven. Keep going until you get answers that don't make sense.