Pomodoro timer. If I get into flow I ignore it

VS Code with Foam for notes. I plan out my day by hour (sometimes more granular) and make each of those items a todo item so that I'm checking something off at least once an hour. It also helps remind me what to move on to next. I recently incorporated a checklist for starting and ending the day. It's nice because then I don't spend mental energy thinking about how to prepare and shutdown, I just follow a well thought out pattern. The ritual of it helps my brain transition in and out of work.