Precisely to solve this you describe is that ulog was born. you will always have a subject to write because ulog is about writing about how your day happened, what did you do or what did you stop doing, how do you feel, you slept well? how is the food? etc.

https://steemit.com/ulog/@surpassinggoogle/ulog-become-a-ulogger-today-reshaping-the-entire-internet-with-steemit#@mei07/re-surpassinggoogle-ulog-become-a-ulogger-today-reshaping-the-entire-internet-with-steemit-20180506t115917982z