What I have done for this is to create a template to always know where I am on my router table. I create my original drawing in my "Standard Template", I may have multiple peices to cut, which I have in blocks. I then copy one of the blocks & start a new drawing with my "CAM Template" & paste into it. I then explode the block, which allows me to create my tool paths. All I have to do to the template is add the tools I will use. I then save this as a unique name in the same folder where I saved the drawing created in the "Standard Template". Inside that same folder I have a folder named "G-Code" which I store my programs for this particular project.