Over the past few years, I've tried a few variants:

1. Local file + vim：https://www.jakehao.com/vim-work-journal

2. Github issue：https://www.jakehao.com/github-wiki

3. nvAlt + Gmail + Awk script：https://www.jakehao.com/gmail

I've failed to use #1 and #2. My motivation faded away at some point.

I am currently using #3 that is inspired by one of PG's tweet:

https://twitter.com/haojianzong/status/1236068095451488257

What's your solution? Would you like to share?