for the broken key, thats an easy fix there are multiple guides to where all the broken keys are, you can just use those and go to all 15 locations to see what you missed.
sadly theres no list for extras which is what im missing. and its a pain going through 200+ pages to figure out what I am missing.
there is a list in this thread somewhere with all the photo's/profiles, just do a search in this thread for a name of one of the pictures you have and you can find it easily. (it's what i did to figure out what i needed)
i basically used that list, printed it, compared it to what i have and looked up the ones i didn't have in greg87's walkthrough. Same goes for the kamasutra pages, every girl has 5 pages in total, 4 for themselves and a 5th one with threesome actions (so if you get the 5th one its for 2 girls at once).
Get everything from the shop to upgrade your home and then booty call each girl at least once, only unlocking a number doesn't count completely for the 100% you need to actually have them visit your bedroom.
the last part of the extra's is from the ancient temple puzzles, the puzzles mention what you need in order for them to unlock, if it mentions x item in inventory, keep it in your inventory until you cleard it otherwise the puzzle locks up again. (Basically if you go for clearing all 49 puzzles you will have most of the 100%)