After reading about PAWS, I realize why keeping a journal in the early weeks was so important to me.
1. It gave me a place to put all of my random feelings
2. It helped me organize my scattered brain. I would use it to remind myself of the simplest things that I knew I would forget. What I did today, what I need to do, things I need to buy, how much money I spent, what I ate, etc. It kept me grounded in reality when years of habitual behavior was unravelling.
I rarely use it now, but it was a lifeline for me. My advice to those starting out: grab a simple notebook that you can keep with you all the time, and start writing.