I keep my journal out at my breakfast table. Every morning I come sit down with my breakfast and some tea and it is there waiting for me. You don’t have to set a length requirement and even if your entry for that time is short, at least you put something down. Another way I’ve noticed was easier for me was having a theme for my journal. I have several different journals, I.e. a creative journal, a goals and thoughts journal, and a Bible study journal. Odds are, you’ll find something to write about in at least one of them every day.
Atmosphere. Quiet place, comfy, good temp, comfortable position to write in, a nice hot coffee or tea or what ever you like, set a 10 min timer, freewrite, put pen to paper and just flow. Dont worry about mistakes or spelling or logic, just write.