Most of the time it's "I have to do this" or "I wish I had time to do this" or "Hey here's a random idea I had" or "My kids did this cute thing" or "We fought about this, here's what I think" or "oh here's my 3 favorite links from HN and what I thought about them or what they made me think about."

It took time to realize that was worth writing down.

Honestly I look back 10 years and see things like you describe. "I went to the gym for an hour, worked on this or that, blah blah", and I really love seeing that too. That's life man. Those memories fill your brain up with experiences and a sense of time if you let it. Just remembering how fit I used to be makes me happy and makes me want to do that again.