What does "ready" actually mean and maybe more importantly what does it not mean?

What are things that Scrum Teams can actually commit to? What are things that Scrums Teams cannot and should not commit to?

As a new Product Owner what are some of the things you might want to consider to help you on the amazing journey ahead.

As a new Scrum Master what are some of the things you might want to consider to help you on the amazing journey ahead.