Definitely step out of your comfort zone.
Don't like heights? Try climbing high up. You have no idea how beautiful a place could be until you're high up.
Don't like spooky things? Then expose yourself to something a bit more spooky (not "I can't sleep" spooky, though!)
Let's face it, life can be boring if you stay in your little bubble. I'm speaking from experience.
We should all step out of our little safety bubble every now and then!