Get out of your comfort zone at least once a week. If you do it often enough it won’t be that scary anymore. You can only know how far you can go by pushing your boundaries.
Successful people don’t just leave their comfort zone, they live out it!
Do you have a great business idea but are too scared to present it? Give it a try, talk to friends, talk to others who have done something similar.
Are you postponing an action item because it seems to difficult to complete? Write down three ways to get it done and chose the one that makes you feel less uncomfortable.