Kate is doing both the DB and TG questlines now, and after really paying attention to Armand and Ocheeva, I am finding it's actually kinda fun making my own journal. I write chicken-scratch while receiving Kate's quests. Just write down names, locations, what I should do. Later I'll straighten things out so it makes sense and is easier to read.
Try it! I'm really wishing I had started this habit earlier!