Every day for the last 1.5 years!
I write it in a running text document with the latest entry at the top. Keeping it simple has made it easy to keep up with.
I've settled into the following format.
* date
* how yesterday went and any notable events
* what I'm hoping to get done today
* as of lately, local covid #s
* 3 things I'm grateful for
* the top headline of the day
* a quick rating of my current "thinking power", energy, mood, and how I'm feeling physically