Bring awareness to your comfort zone and your natural tendency to stay inside it.
Change your frame of mind. View your comfort zone not as a shelter but a prison. Embrace constructive discomfort. Don’t take the safe, known path. Choose challenge over comfort, and set goals that force you to get out of your comfort zone. Learn to be comfortable with being uncomfortable.
Gradually expand the perimeter of your comfort zone. Lean into the discomfort. Don’t sprint out of your comfort zone, take small but frequent steps. Push the walls out, don’t try to knock them down.
Periodically check your progress to confirm that you’re going further out over time.
As your life continues to improve it will become easier to expand your comfort zone, because when you’re happy, optimistic and confident, you’ll be more inclined to take risks and live adventurously.