I would recommend to watch Arrival _before_ reading Story of Your Life and this post: I think that Story of Your Life contains spoilers for Arrival which aren't

I would recommend to watch Arrival _before_ reading Story of Your Life and this post: I think that Story of Your Life contains spoilers for Arrival which aren't nearly as spoilery the other way around. I found Arrival more emotionally touching, and Story of Your Life more scientifically interesting, so both are worth while.