What does the phrase,
"I need to be with myself and center..."
mean? It's part of the lyrics of Fergie's Big Girls Don't Cry.
She needs to center herself.
Expression meaning to focus
Example from a course in self healing: http://healingcurrents.blogspot.com/2010/03/what-does-it-mean-to-center-oneself.html
Some popular cliches in spiritual literature include "Center Yourself", or "Find Your Center". Or, how about "Navel Gazing" as a derisive term for day dreaming, wasting time on "non-productive" activities? What do these terms mean? Is there a practical meaning that escapes most people? The human body is a bit like the planet that we live on. It has a North pole (the Crown Chakra at the top of the head), a South pole (the Root Chakra that spins straight down from just in front of the tailbone), and an axis on which the energy of our body spins. We call this axis the "tube of light", or "central vertical current".
I think you're confused probably because you are expecting a list of things, therefore you might think that center is a noun in this phrase, which is wrong.
All you need to do is to realize that center is a verb in this case and thus the phrase can be formed as:
I need to be with myself and focus ..."
Then, all should be pretty clear.