Where I wrok, we use start parts for part, sheetmetal and assembly models. These start parts contain the three default datum planes, coordinate system and standard parameters which we use to drive title block information and bom's. Also in the start part files, you can set up the seven standard drawing views. When we initially create a model using the start part files, it automatically asks for parametric information such as description, drawn date, drawn by and the like. This information is used in title blocks and bom's as I stated earlier. I find them to be very useful and somewhat of a time saver.