General wrapping paper down the side of our wardrobe, there is probably still some Christmas wrapping paper in the loft from last year with the Christmas box.
Cards go on display for a few weeks after the occasion, and then in recycling. I used to keep them, but I just do not have the room.
Handbags in a underbed storage box, except for whichever I am using the most of the minute.
Post in a wooden post holder on the shelves in the sitting room, which gets sorted periodically when I can't squeeze another envelope in
Plastic tat from party bags and McDonalds or pocket money spends goes in the bin/to the tip to be recycled. My children don't know that Happy Meals come with toys, as I always whip them straight out. Party bag stuff is allowed to drift around the house for a week or two before it disappears, and they are too little for pocket money spends. A few magazine toys have become persistant favourites, so they have an old Chinese takeaway tub to live in with the other toys.
Batteries in one of those little Ikea units with the little drawers. Also where I keep sellotape, card readers for online banking, and other random bits and bobs.
Magazines / books that are on the go on the shelves in the sitting room.
Shoes that are almost constantly in use for the children go in a basket on the stairs, though they are starting to outgrow this. Ours tend to be shoved in a large basket in the cupboard under the stairs except for sandals which live by the back door.