I don't save anything that I can't get along without in the normal template, and then I save a backup. Below is a screenshot of some of them in my templates folder. Only the normal.dotm is in use. This is primarily a storage for my general styles and a bunch of macro utilities that I've gathered over the years. These macros don't even show up in my macro list in Word because I have them marked as private.

Important code (macros) is exported to .bas files and that which is used on a regular basis is stored in other Global Templates. Likewise building blocks are stored in other templates, either global templates or document templates, depending on how they will be used. I seldom store my own building blocks in the default building blocks files.