I have been using a single text (markdown) file for at least five years instead of the todo list I usually write what is done during the day and sometimes add important tasks that need to be done. I try to keep everything fairly plain and avoid overcomplicating the structure. For me this provides an easy way to go over the history, usually try to document more complex devops operations, decisions etc.

I use Sublime to keep the document open there, works really well with larger files.

Each day begins with separating section: # 08.02.2020 # ... # 09.02.2020 #