I read a great article where Michael Phelps was interviewed. He talked about visualisation and how it helped him stay focused and accomplish his goals.
When Jill was in Montreal doing her flight attendant training, some of the people in her group would get totally stressed out and unable to achieve what they wanted on their performance assessments and their written tests. I'm sure Jill's experiences with swimming helped her to focus on the moment and do what she needed to do.