OBTF

2005年頃、アメリカのライフハック界隈で日記になった。

（デイリー方式ではなく）一つのファイルに ideas, thoughts, events, notes, and tasks をまとめる。

ref.

For the record, I think the most “powerful” note-taking and writing system is the one that you find enjoyable to use, allows you to retrieve old ideas, and inspires you to write and think every day. Anything more is superfluous and might actually get in the way.