After finishing Fatal Frame 3, I did some info searching at Beyond the Camera's Lens and GameFAQs, just to see if I missed anything.
I knew I missed a couple of items. Having Folklore Notes 1 and Folklore Notes 3 but missing Folklore Notes 2 was pretty obvious. And of course, all the Vanishing Ghosts that fade out just as I realized they were there...
But I somehow managed to completely avoid one of the legends of Fatal Frame 3, the Stroller Grandma. Not sure how I skipped that bit, but I never saw a single Stroller Grandma. Didn't see one until the Mission Mode that you unlock after beating the game. Huh.
I also totally missed the Notched Arrow Key section, which eventually grants you the Measure Function. Measure allows the Camera Obscura to pop up a life meter on enemy ghosts. Never got it. so I did all the game's big final boss confrontations with absolutely no notion of their HP status. Nice.
I never noticed half of the ghost visits that show up back in Rei's apartment. Duh. (Relatedly, I waited until about a third of the way in before I started giving Miku pictures to research... just kinda missed the point on that when the game first mentions it, and then forgot about it until randomly talking to Miku later on.)
So I have started a second playthrough. You get to purchase new camera bits for use during the second play and in Mission Mode, so my camera is getting pretty swanky. Plus, the second play can reveal a new ending.
Postscript: Here's a little something that might appeal to Fatal Frame fans, Japandonland. It's a couple of english translations of photo galleries of abandoned buildings in Japan. Apparently there's a whole subculture (both in Japan and the rest of the world) of people who invade and explore decaying, decrepit buildings. And, of course, take pictures and blog it. When they're not being run off by cops or threatened by homeless squatters. Rhonda and I actually did that once, at some giant abandoned hotel in midstate NY. The exploring part, not the blogging, running or threatening parts.
What makes Japandonland especially interesting to me is when you see real life pictures of stuff that could be straight out of a Fatal Frame game... shattered walls, mulched tatami mats, scattered leaves and debris. If you're game, start at Japandonland and then go here (Haikyo Explorer) for the full, unabridged, untranslated source material.
Post-postscript: I found that slick "Gals of Project Zero" image here, on some site I never heard of before. The artist's handle is Phanatica.