You do not have to write a novel or short story. I am talking about just writing.
Reason one. When I was in college I read-and I can’t remember who it was that said it-“How do I know what I think until I write it down?” But before you laugh and say “I know what I think” you might be surprised. For example I wrote film reviews for ten years. Once I thought I liked a certain movie, but as I started to write the review I realized I was writing a bad review. It really was not as good as I thought. My brain, through writing my thoughts more coherently took the opposite course. And it surprised me. It happened on more than one occasion. There is something magical about putting words to work. It clarifies your thinking in surprising ways. So now I know what that writer meant.
Reason two. Try a journal and keep track of your progress towards goals. I keep track of what I eat so as not to overdo the sugar intake, which is worse than calories. Keep sugar down, unless it comes with maple bars, ice cream, cakes, pies, or cookies. So you see writing a journal is important to your well being. Then years later looking back at your journal you can see how far you’ve come and can congratulate your self and celebrate with a maple bar.
Reason three. This is important as you get older, but writing keeps your brain active and by being active, it prevents atrophy. Getting back to reason one, writing forces you to think and in using Word.doc it forces your eyes to look at the keyboard, to see quickly hitting the right keys. I do not mean to make light of this. I truly believe it is good eye to finger coordination, and of course you are thinking of that you ware trying to say while doing this. It is a good exercise.
So those are my three reasons. An active brain is a healthy brain and a healthy brain is a healthier you.