To get yourself started, sketch out what you want. Don't worry about measurements or your chicken-scratch style just yet. The main purpose of the sketch is to let you see the ideas in your head. If you're stuck for ideas, it's always a good idea to peruse some magazines and get some pictures of home theaters. There are many different types of home theater interiors that you can draw inspiration from. Plus, if you've hired a professional to help with the home theater designs or setup, then using pictures can help give them a clear idea of what you want.
