I got a lathe last year, and soon, the addiction hit hard. There's something incredible about the hands-on approach to shaping wood that makes you lose track of time fast. Like all skills, you need practice. But turning is immensely satisfying work; you can go from a straight block of wood to a finished project in just an hour or two. And crafting heirloom writing instruments is a great way to get started.
I'm a big believer in pen and paper. I like apps just fine, but I'm a fan of having personal stationary - it makes me that much more likely to actually follow up with kind words and thanks. And a great pen is just as important.