I've journaled since I was in the fifth grade.
It's wild to look back on the poetry and the anxiety of my 11 yr old self and see "Yep, there I am."
When my babies were small I journaled a lot about them and their daily life/schedule.
Now, I journal when there is nobody to talk to, or when I'm overwhelmed, or bored, or ecstatic. It's been a great tool for me.
I have this notion that maybe one day all that I've written will be of some use to somebody else.