I use my bullet journal both as a planner and as a record of my life - things like home maintenance, health records, meal records ("I'm not making that; we just had it two weeks ago"), as well as all the trackers.
I decided I wanted a visual record of some things, like projects and monthly reflections.
I've been intrigued by the mini-printers - the ones that can print directly from a cell phone. I did scrapbooking back in the day, which was just too, too much. Too much time, too much material, too much money. But I think there's something fun and charming about just casually printing a pic from my cell phone, and sticking a photo in my bullet journal.
There are a ton of different ones out there, but I treated myself to a
Canon Ivy 2 and some extra paper. (It was on sale when I bought it). So far it's been everything I wanted and performed as expected. The photos are on sticky-backed photo paper, and look like good quality and resolution.
The photos are pretty tiny, 10 x 16 grid squares, which works out to 50mm x 90mm. I'll need to be careful to spread them out the pages so they don't add bulk all in the same spot and make it hard to write.
Overall, I'm pretty pleased with it!