I couldn't agree more here! A friend has wanted to start a writing/journaling habit for a long time, but didn't know what to write about. I told him, don't think to write—write to think [1].
Show up to an empty page, without knowing, is totally acceptable! So is writing things down that make you feel embarrassed, confused, etc.
When I'm journaling, I often find prompts/frameworks helpful for guiding this escape.
I really like Byron Katie's framework, which she calls The Work [2]. After you notice and draw to mind a stressful thought, answer these four questions:
Q1. Is it true? Q2. Can you absolutely know that it’s true? Q3. How do you react, what happens, when you believe that thought? Q4. Who would you be without that thought?
Then, invert the thought. She writes, "Turn the thought around. Is the opposite as true as or truer than the original thought?"
Derek Sivers also shares some really great questions for journaling for reframing [3].
I also show up to the page
[1] https://news.ycombinator.com/item?id=32628196