Thoughts on thinking too much and hanging on to things.

I'm interested in knowing what I have to let go of.  I seem to be hanging on to something.  I'm thinking whatever my thoughts are or aren't, in terms of thinking, I seem to be hanging on to something.  It's like a polarity.  The yin and yang.  I'm hanging on to one end, and I need to let go of both, and just let them swirl around.