Ask HN: How do you, personally, keep a work journal?

Assuming you keep one. For a long time, I've kept a paper journal for work - usually just 2 lines each day - the day and date, and a line or two of what I did. Helps with standup meetings the next day and has also been helpful to look back and find out when I worked on something.

I'm quite partial to paper but I occasionally would like to search, so I'm thinking of an electronic format - text file, google doc, or something else.

What are your suggestions for keeping an electronic journal?