If you're busy and think you won't have time, there's the "one line a day" habit: You only need to write a brief daily entry. Just write; don't judge the result. "Don't write for perfection," Romanoff said. "I'd been journaling most of my life but I'd never made a consistent commitment," he said. Tackle ProblemsSome people equate journals with frivolity or tallying the trivialities of daily life.