Dear RikerR5,
Early on in my therapy, my therapist asked me to journal daily. At first, I didn't really do it. For me, I had to see her for awhile before I started taking all of her suggestions seriously. You also have to really trust a person before it is possible to really tell them your innermost thoughts. In my case, I am really not a very deep thinker nor was I in touch with my emotions (I sort of buried them) so journalling has become helpful in my recovery.
You've already expressed many thoughts in this post that you can use to "fill in you sheet." That being said, some days, I don't have much to journal about and others days there is much to talk about. For example, conversations with my spouse or children and the thoughts/emotions that are triggered; dreams, fears/anxieties, my thoughts/emotions about my previous therapy session, etc.
Don't beat yourself up if you don't fill the entire sheet out. The therapy is for your benefit. It will be helpful to you to express to your therapist why some portions of the sheet were hard to fill out. Your therapy should not be stressful. I think it works best when you find yourself looking forward to sharing a discovery about yourself with your therapist and when you no longer worry about letting your therapist down.
I hope this helps you with your sheet. Your posting makes complete sense to me. For some of us, being able to identifying things/thoughts/feelings, and explain them, takes time and practice.
Sincerely, Myst