I admit, i adore miniatures. When I was a little girl, my mom took me into Shackman's quite often, as she loved dollhouses. So I don't know if its nature or nurture that gave me a love of minis.
The above site has tons of free printables, in different scales. I think my favorite printables they have are the little bakery-style cake and donut boxes, because I use polymer clay to make mini foods.http://www.google.com/search?q=michaels+hutch&hl=en&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=D3M1T4KnAauw0QGM3PirAg&sqi=2&ved=0CHEQsAQ&biw=1366&bih=644
Michaels craft stores have these $1 hutches, or at least they used to.... its been awhile since I visited Michaels LOL. These are some pictures of how people altered them to make different styles of furniture. Keep in mind, these are NOT perfect 1:12 scale, but they are close enough for me (the knobs are HUGE for dollhouse hands, but work for my fingers to open and close, they are around the size of a large seed bead
For Barbie scale, I use clean bottlecaps to make pies and tarts in. I just pry out the plastic disc at the bottom, and bake polymer clay right in there BUT if you use non-baking clay, you don't need to take out the plastic.
Holeless "minibeads" make great sprinkles on mini cakes, and if I get my hands on some orange translucent minibeads, I will let you know if they make Barbie sized Caviar.
I keep an eye out for "other" craft supplies that might work well in a dollhouse.
In the bead section- small charms like silver scissors are often perfect scale, jewelry findings like pins with a loop head make good Shish Kabob skewers for Barbie.
Wood Craft- wood or paper mache boxes, chests, or things to build a roombox in, tiny wood bowls, picket fences and flowerpots.
Scrapbook/ Paper Craft- scrapbook paper can be perfect wallpaper, can be used to dress up cheap wood hutches. Stickers or postage stamps can be framed with flat toothpicks and hung as art. Charms appear here as well. Glue and adhesives with tiny tips for detail work. Also there are fancy dimensional stickers that make cute wallhangings and accessories. Flower shaped paper punches make great foliage when threaded on a pin or wire. Round paper punches, layered, make plates or cake doilies
Kids Crafts- Never overlook this section, you never know what you'll find, especially the plastic scale animals and knights.
Clay- Makes foods, rocks, people, pets, just about anything.
Fabric- small prints work very well, and it takes only scraps of fabric to reupholster dollhouse furniture. Cloth napkins can work for this also. Felt can make good rugs
Cake Decorating/ Wedding- there are tiny gazebos, birds, little charms, and cake toppers that can be repurposed.
Paint- Acrylic paint in a tube makes good frosting on dollhouse cakes, nice thick buttercream look
Railroad- Most craft stores have a railroad area, many of the items are way too small for 1:12 scale, but might work in 1:24. However, some things like trees could be a shrub, a park bench could be a dollhouse kids bence etc.
Sheer garbage, turned into awesome-
little half and half or creamer cups make trash baskets for 1:12. Toothpaste caps make trash basket for 1:24.
Pizza thingy to keep the cheese off the box, they are little three legged tables waiting to happen
Small mirror from used up compact or powder CAREFULLY removed as a big mirror in the dollhouse, 1:12 (or medium mirror 1:6)
In magazines, there are ads for "6 books for $2", where there are mini pictures of the covers of popular books. Cut them out and glue to paper 'pages'... Imagine, kids books in their room, cookbook in the kitchen, romance novel in the sewing room LOL