I have been doing a bit of home renovation and construction of late, and some of it has involved breaking down sheets of plywood, which I now do using a piece of rigid foam lying on my garage floor and a Kreg Circular Saw Guide. As long as I am crawling around with a saw in my hand, I prefer to make as many cuts as I can. For that, I use a cut sheet, which I make using the incomparable Incompetech’s Graph Paper Generator. The settings captured in the image below produce a graph of 4 x 8 squares broken into 6-inch and then one-inch cells, but if you just want the PDF to print out and use: here it is.*
*If you prefer your graph paper in blue.