How do I become a goal setter?

I was in a meeting a few days ago and the leader of the meeting was closing by asking us to “blow our own minds”. She wanted a list of things we will do in 2018 that are super goals for ourselves. I totally drew a blank. I realized that I may not know how to dream or set goals. Maybe it comes from a place of disbelief or a fear of disappointment? I’d love your thoughts about this and some ideas of how I can open my mind up to creating lofty dreams and goals. Thank you!