Some files are saved electronically (and some ideas saved here on my favorites), others are printed out and saved in a folder.
I also save a list of various formats (i.e. various timed interval formats and various themes for classes such as supersets, etc..).
It helps if I just want to do a particular format, and then I can plug in the various exercises according to my preferences.
Hope this helps…
I forgot to say earlier, I have also developed a couple of Excel templates and checklists for workouts. I save the blank templates in a folder called “templates” and then if I need inspiration, I can open up one of those and fill them in.
So, for example, I have a checklist for planes of motion. If I want to make sure a particular workout uses one plane more than the others, or whether a workout is balanced in all planes, I’ll start with that spreadsheet, save it with another name, and use that as an idea jump-starter for the workout.