Just put your todo list at the bottom or to the side of the journal. The strength of a journal is that it’s a flexible format. The main switch I’m suggesting is what you’re using as your primary working document. Many people normally use a todo list, editing it, checking it off, checking back on it, adding tasks, re-ordering tasks. The switch is to move that todo list to the side, as a set of reminders and then move to using the journal as your working document.