Step One: go look at every stone option in town. Ask how many it takes to make a circle and then use whatever number you think is right. Te correct answer is twelve.
On the driveway, lay them out in a circle and measure the diameter.
Haul all your shovels and a can of spray paint and a couple of bricks and a level to the site.
Try to make it level. Or not...
First layer down..
Add the third layer and you are done.