Alexander B. Joy wrote about two-sentence journals last summer and I found it very interesting way to do journaling.
I can really relate to his note
Completionist impulses are my downfall. I’m prone to being too thorough – I want to record every event, document every detail, and capture every worthwhile thought from the day in service of compiling a meaningful chronicle of the life I’ve lived. But, as a logistical matter, this approach has proven untenable. Writing entries in that maximalist style takes hours. Eventually the task of recording a new day feels too burdensome to be enjoyable – to the point where I give up on writing new entries entirely.
He writes about how, based on a role-playing game Thousand Year Old Vampire, he started writing short journal notes that are easier to write (helping staying consistent) and turn days into short stories.
If you want to implement something like this on a digital system, you could use jrnl.