Diaries are very important if only for entertainment; as Gwendolen says in The Importance of Being Earnest, “I never travel without my diary. One should always have something sensational to read in the train.” And that’s before you get to the sense of nostaligic shame that sweeps over you when you realize how completely lame you were back then (“back then” being twenty years or twenty minutes). But the most important thing about keeping a journal is that it actually is good for you. The study I cited when I taught was done on college students; not only did their stress levels decline when they journaled for a month, months after they stopped their levels remained lower. That’s good stuff. I buy journals because they’re pretty and never use them because I blog, which is not the same thing because I can’t put my deepest thoughts and fears here.