There are some miniature blogs that provide wonderful links to tutorials of all sorts. One I found is called “true2scale” and in March they listed 100 different project tutorials. It is amazing how many people there are out there willing to share their expertise in creating miniatures.
Check them out here: 100 Miniature Spring Tutorials
I also found some plans for Mission-style furniture at a site called “Stan’s Plans.” It is actually providing plans for full size furniture but they are easily scaled down to 1:12 scale because all the measurements are in inches.
Anthropology of the World's Fairs 