i only journal when i feel like i actually need to - if i had a good day that i want to remember the details of, or if i'm having a hard time emotionally and need to vent my feelings. i don't force myself or set a routine in order to avoid autopilot mode.
once i started thinking of journalling like that as opposed to a habit i needed to keep up with, i actually started doing it more frequently!! made me really take notice of what i'd like to write about/remember in my days!!