What is the difference between "Save Family As..", "Save Template..", and "Save Method.."?

When you save a template or method, Prism puts your file into the appropriate folder; you see templates listed on the "Welcome" or "New Table" dialog. You see methods listed on the "Analysis" dialog. If you save a family, you save one sheet and its related graphs and analyses wherever you want.

One other trick that applies to Prism 3. You can use "File... Save As" and then choose the Prism template file type. This lets you save an entire project with more than one data table (saving a template just saves one table and its relatives) as a "pzt" (template) file. In this case, Prism won't let you accidentally save over the same file--you have to give it a new name after opening. Prism 4 gives you a new way to save a project as a template.