This is a great, loosening writing exercise from Room to Write by Bonni Goldberg. Fill a page with I used to be ___ but now ___ sentences. Here are some of mine, from a January entry:

I used to be angry but now I am cold.
I used to ache for quiet but now I am deaf.
I used to run fast but now I run long.
I used to want a kitchen with black and white tile but now I have a kitchen that feeds me.
I used to wander at night but now I sleep.
I used to blame you but now I forgive me.
I used to want more but now I live with less.

Fill a page. Loosen up more than I did. Circle a couple sentences you want to explore. Spend a page exploring.