I use a lot of the protoboards like the one sold here at CircuitGizmos for developing prototypes of all sorts of circuits.
Too often, though, the circuits are created but the effort isn’t documented. Often times the prototype is considered for reuse or modification later, but then it has to be reverse-engineered. With document templates that have a diagram of the circuit card on them I can print out a page and mark up that page as I build the prototype.
The template pages have the front and back of several PCB boards that are a grid of holes with “donut” copper on them. Here is the front image from the board sold here at CircuitGizmos:
And the back side:
The template files cover seven of the boards that I use for creating prototypes. I print the .PDF file, three-hole-punch the page, and clip it into a binder where I collect my prototype documents. I can mark up the page to show where I’ve placed components and connectors. There is room on the page for notes. The bottom of the template pages contain a title block for documenting the project.