How about a Mario theme? Thats my theme. My upstairs is my kitchen and my basement (My favorite room.) Has a robo theme and all of my cool items are there. Including two hacked items there called not availibe or something. (I can't remember.) They are invisible chairs.
in my main room, i'm working on decorating with some fossils so i have 1-3 fully formed dinosaurs... as of now i'm using jingle furniture, but i'm looking for something that would go more into the dinosaur theme, lol.
ON the first floor, have a rare series or theme of furniture (one you get from a special event) for example; mario, pirate, spooky, snowman, jingle or mush. These are very easy to get, they just require patience to complete.
You don't need a complete theme to get lots of bonus points, just the carpet, wallpaper, and a piece of matching furniture. Each matching piece of furniture with carpet and wallpaper gives you 3000 bonus points. For example, I have the lab wall and floor, I get 3000 points just from that, but for every piece of lab furniture that I put in, for example lab chairs, I get 3000 bonus points for each one.
I have the full Spooky Series on my main floor, and then some other furniture items *cough* Samurai Suit *cough* *cough* bought it off one of my neighbors for a REALLY low price *cough*