Most riding carts will have a sand box and scoop on them to fill in fairway divots. If you walk with a pull cart, you can carry a pint or quart sized bottle filled with a mixture of sand and grass seed. Just be sure to have the same kind of grass seed that is already growing on the fairways. That way, in only a few days, the divot will be covered over with new growth. I think SILVER MACHINE has the right idea...fix more than you tear up. If we all did this, our golf courses would stay nice.