Want to keep a journal? The problem isn't consistency. It's the blank page.
You bought a notebook. Or downloaded an app. You wrote for three days, maybe a week. And then you ran out of things to say. In the evening, facing a blank page, you'd end up writing "today I did..." and it led nowhere.
The problem with an introspection journal isn't the format. It's the lack of direction. An empty notebook gives you total freedom, and that total freedom often produces a monologue that goes in circles.
Why you never know what to write
The journaling prompts you find everywhere ("3 good things from today," "what you're grateful for") have one problem: they're too light to produce real reflection. They ask you to note things you already know, without pushing you to look at something you hadn't seen.
The exercise below gives you a specific direction. Instead of writing freely, you're going to pick a regret that keeps coming back and look at it closely, to understand if you can still act on it or if it's time to set it down.
A journal is only useful if it shows you something
What you just did is real journaling. Not "3 gratitudes and an intention." Serious work on something that was taking up space in your head. And the result is something you'll be able to read again in three weeks and it'll still tell you something.
The Vector path works like that from start to finish: precise questions, a result you keep, and a progression from one step to the next. To go further: understanding your quitting pattern.