Who do I follow?!

I've been thinking lately about who I follow. Who do I let speak into my mind?
Who do I allow to speak into my spirit?
I'm still working on this but have come up with a list, of sorts.

Christian preachers - Mark Driscoll, John Piper, Jerry Bridges etc
TV
Colleagues at work
Mum
Friends
Church
The Bible
Music
My own "original" thoughts
Experiences

I wonder who I allow to shape my thoughts most? What is this making me like as a person? I guess we're moulded by what we allow to mould us.

"Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is—his good, pleasing and perfect will." Romans 12:2