Commit to this habit for just 5-10 minutes a day.
Write about your day. Your hopes for tomorrow. Your fears. Write what you're grateful for.
Write poetry...Short Stories...
Work on a book idea....
Write down your dreams.
Write letters to people.
Write for the public.
Write whatever the fuck you feel like writing.
If you need a writing prompt- change the station on a radio, or open up a book and point to a random word.
If you want a dope journal- check out these ones I designed.