Furniture Design
I acquired my furniture design training in the 50's, in England, where it was mandatory to be a qualified cabinet maker before being allowed to take the final exams.
The three important aspects of any design are Function, Construction, and Appearance.
Appearance is listed last because appearance must never compromise the other two aspects.
If it's well constructed, does the job and looks good then it is a good design.

Below you will find furniture designs you can easily make in a home workshop as well as other information you may find interesting.